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Finding the Fourth Proportional to 421,464, 632,064.78 and 140,915.64

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Solution

The fourth proportional to 421,464, 632,064.78 and 140,915.64 is: 211,329.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,464 : 632,064.78 = 140,915.64 : x
  2. Step 2: Convert to fraction form
    421,464/632,064.78 = 140,915.64/x
  3. Step 3: Cross multiply
    421,464x = 632,064.78 × 140,915.64
  4. Step 4: Simplify right side
    421,464x = 89,067,812,995.16
  5. Step 5: Solve for x
    x = 89,067,812,995.16/421,464
  6. Step 6: Final answer
    x = 211,329.59

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