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Finding the Fourth Proportional to 662,056.80, 993,085.20 and 425,666.40

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Solution

The fourth proportional to 662,056.80, 993,085.20 and 425,666.40 is: 638,499.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,056.80 : 993,085.20 = 425,666.40 : x
  2. Step 2: Convert to fraction form
    662,056.80/993,085.20 = 425,666.40/x
  3. Step 3: Cross multiply
    662,056.80x = 993,085.20 × 425,666.40
  4. Step 4: Simplify right side
    662,056.80x = 422,723,001,977.28
  5. Step 5: Solve for x
    x = 422,723,001,977.28/662,056.80
  6. Step 6: Final answer
    x = 638,499.60

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