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Finding the Fourth Proportional to 397,920.60, 549,120.06 and 216,636.12

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Solution

The fourth proportional to 397,920.60, 549,120.06 and 216,636.12 is: 298,952.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,920.60 : 549,120.06 = 216,636.12 : x
  2. Step 2: Convert to fraction form
    397,920.60/549,120.06 = 216,636.12/x
  3. Step 3: Cross multiply
    397,920.60x = 549,120.06 × 216,636.12
  4. Step 4: Simplify right side
    397,920.60x = 118,959,239,212.57
  5. Step 5: Solve for x
    x = 118,959,239,212.57/397,920.60
  6. Step 6: Final answer
    x = 298,952.20

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