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Finding the Fourth Proportional to 521,208.80, 782,396.40 and 403,402.40

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Solution

The fourth proportional to 521,208.80, 782,396.40 and 403,402.40 is: 605,554.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,208.80 : 782,396.40 = 403,402.40 : x
  2. Step 2: Convert to fraction form
    521,208.80/782,396.40 = 403,402.40/x
  3. Step 3: Cross multiply
    521,208.80x = 782,396.40 × 403,402.40
  4. Step 4: Simplify right side
    521,208.80x = 315,620,585,511.36
  5. Step 5: Solve for x
    x = 315,620,585,511.36/521,208.80
  6. Step 6: Final answer
    x = 605,554.98

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