Finding the Third Proportional to 54,143.25 and 83,676.75

Step by Step Solution

1. Step 1: Write the proportion equation
   54,143.25 : 83,676.75 = 83,676.75 : x
2. Step 2: Convert to fraction form
   54,143.25/83,676.75 = 83,676.75/x
3. Step 3: Cross multiply
   54,143.25x = 83,676.75 × 83,676.75
4. Step 4: Simplify right side
   54,143.25x = 7,001,798,490.56
5. Step 5: Solve for x
   x = 7,001,798,490.56/54,143.25
6. Step 6: Final answer
   x = 129,319.88