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Finding the Fourth Proportional to 390,945.72, 539,226.92 and 358,784.24

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Solution

The fourth proportional to 390,945.72, 539,226.92 and 358,784.24 is: 494,866.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,945.72 : 539,226.92 = 358,784.24 : x
  2. Step 2: Convert to fraction form
    390,945.72/539,226.92 = 358,784.24/x
  3. Step 3: Cross multiply
    390,945.72x = 539,226.92 × 358,784.24
  4. Step 4: Simplify right side
    390,945.72x = 193,466,120,679.74
  5. Step 5: Solve for x
    x = 193,466,120,679.74/390,945.72
  6. Step 6: Final answer
    x = 494,866.96

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