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Finding the Fourth Proportional to 666,206.22, 919,308.64 and 394,226.80

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Solution

The fourth proportional to 666,206.22, 919,308.64 and 394,226.80 is: 543,999.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,206.22 : 919,308.64 = 394,226.80 : x
  2. Step 2: Convert to fraction form
    666,206.22/919,308.64 = 394,226.80/x
  3. Step 3: Cross multiply
    666,206.22x = 919,308.64 × 394,226.80
  4. Step 4: Simplify right side
    666,206.22x = 362,416,100,814.89
  5. Step 5: Solve for x
    x = 362,416,100,814.89/666,206.22
  6. Step 6: Final answer
    x = 543,999.88

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