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Finding the Fourth Proportional to 396,474.78, 546,380.99 and 389,188.02

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Solution

The fourth proportional to 396,474.78, 546,380.99 and 389,188.02 is: 536,339.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,474.78 : 546,380.99 = 389,188.02 : x
  2. Step 2: Convert to fraction form
    396,474.78/546,380.99 = 389,188.02/x
  3. Step 3: Cross multiply
    396,474.78x = 546,380.99 × 389,188.02
  4. Step 4: Simplify right side
    396,474.78x = 212,644,939,415.37
  5. Step 5: Solve for x
    x = 212,644,939,415.37/396,474.78
  6. Step 6: Final answer
    x = 536,339.13

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