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Finding the Fourth Proportional to 415,312.12, 622,530.78 and 215,420.32

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Solution

The fourth proportional to 415,312.12, 622,530.78 and 215,420.32 is: 322,903.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,312.12 : 622,530.78 = 215,420.32 : x
  2. Step 2: Convert to fraction form
    415,312.12/622,530.78 = 215,420.32/x
  3. Step 3: Cross multiply
    415,312.12x = 622,530.78 × 215,420.32
  4. Step 4: Simplify right side
    415,312.12x = 134,105,779,837.45
  5. Step 5: Solve for x
    x = 134,105,779,837.45/415,312.12
  6. Step 6: Final answer
    x = 322,903.60

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