Finding the Third Proportional to 57,705.38 and 86,327.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,705.38 : 86,327.50 = 86,327.50 : x
2. Step 2: Convert to fraction form
   57,705.38/86,327.50 = 86,327.50/x
3. Step 3: Cross multiply
   57,705.38x = 86,327.50 × 86,327.50
4. Step 4: Simplify right side
   57,705.38x = 7,452,437,256.25
5. Step 5: Solve for x
   x = 7,452,437,256.25/57,705.38
6. Step 6: Final answer
   x = 129,146.33