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Finding the Fourth Proportional to 628,606.55, 867,477.06 and 342,128.68

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Solution

The fourth proportional to 628,606.55, 867,477.06 and 342,128.68 is: 472,137.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,606.55 : 867,477.06 = 342,128.68 : x
  2. Step 2: Convert to fraction form
    628,606.55/867,477.06 = 342,128.68/x
  3. Step 3: Cross multiply
    628,606.55x = 867,477.06 × 342,128.68
  4. Step 4: Simplify right side
    628,606.55x = 296,788,779,299.39
  5. Step 5: Solve for x
    x = 296,788,779,299.39/628,606.55
  6. Step 6: Final answer
    x = 472,137.58

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