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Finding the Fourth Proportional to 916,538.20, 1,374,255 and 411,007.78

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Solution

The fourth proportional to 916,538.20, 1,374,255 and 411,007.78 is: 616,264.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,538.20 : 1,374,255 = 411,007.78 : x
  2. Step 2: Convert to fraction form
    916,538.20/1,374,255 = 411,007.78/x
  3. Step 3: Cross multiply
    916,538.20x = 1,374,255 × 411,007.78
  4. Step 4: Simplify right side
    916,538.20x = 564,829,496,703.90
  5. Step 5: Solve for x
    x = 564,829,496,703.90/916,538.20
  6. Step 6: Final answer
    x = 616,264.00

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