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Finding the Fourth Proportional to 405,742.10, 608,613.15 and 394,078.10

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Solution

The fourth proportional to 405,742.10, 608,613.15 and 394,078.10 is: 591,117.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,742.10 : 608,613.15 = 394,078.10 : x
  2. Step 2: Convert to fraction form
    405,742.10/608,613.15 = 394,078.10/x
  3. Step 3: Cross multiply
    405,742.10x = 608,613.15 × 394,078.10
  4. Step 4: Simplify right side
    405,742.10x = 239,841,113,787.02
  5. Step 5: Solve for x
    x = 239,841,113,787.02/405,742.10
  6. Step 6: Final answer
    x = 591,117.15

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