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Finding the Fourth Proportional to 678,774.78, 936,654.57 and 392,313.42

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Solution

The fourth proportional to 678,774.78, 936,654.57 and 392,313.42 is: 541,360.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,774.78 : 936,654.57 = 392,313.42 : x
  2. Step 2: Convert to fraction form
    678,774.78/936,654.57 = 392,313.42/x
  3. Step 3: Cross multiply
    678,774.78x = 936,654.57 × 392,313.42
  4. Step 4: Simplify right side
    678,774.78x = 367,462,157,715.33
  5. Step 5: Solve for x
    x = 367,462,157,715.33/678,774.78
  6. Step 6: Final answer
    x = 541,360.95

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