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Finding the Fourth Proportional to 579,672.60, 869,508.90 and 421,042.20

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Solution

The fourth proportional to 579,672.60, 869,508.90 and 421,042.20 is: 631,563.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,672.60 : 869,508.90 = 421,042.20 : x
  2. Step 2: Convert to fraction form
    579,672.60/869,508.90 = 421,042.20/x
  3. Step 3: Cross multiply
    579,672.60x = 869,508.90 × 421,042.20
  4. Step 4: Simplify right side
    579,672.60x = 366,099,940,175.58
  5. Step 5: Solve for x
    x = 366,099,940,175.58/579,672.60
  6. Step 6: Final answer
    x = 631,563.30

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