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Finding the Third Proportional to 211,956.75 and 318,390.75

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Solution

The third proportional to 211,956.75 and 318,390.75 is: 478,270.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,956.75 : 318,390.75 = 318,390.75 : x
  2. Step 2: Convert to fraction form
    211,956.75/318,390.75 = 318,390.75/x
  3. Step 3: Cross multiply
    211,956.75x = 318,390.75 × 318,390.75
  4. Step 4: Simplify right side
    211,956.75x = 101,372,669,685.56
  5. Step 5: Solve for x
    x = 101,372,669,685.56/211,956.75
  6. Step 6: Final answer
    x = 478,270.54

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