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Finding the Fourth Proportional to 445,409.80, 668,114.70 and 209,213.80

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Solution

The fourth proportional to 445,409.80, 668,114.70 and 209,213.80 is: 313,820.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,409.80 : 668,114.70 = 209,213.80 : x
  2. Step 2: Convert to fraction form
    445,409.80/668,114.70 = 209,213.80/x
  3. Step 3: Cross multiply
    445,409.80x = 668,114.70 × 209,213.80
  4. Step 4: Simplify right side
    445,409.80x = 139,778,815,222.86
  5. Step 5: Solve for x
    x = 139,778,815,222.86/445,409.80
  6. Step 6: Final answer
    x = 313,820.70

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