Finding the Third Proportional to 57,179.25 and 86,190.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,179.25 : 86,190.75 = 86,190.75 : x
2. Step 2: Convert to fraction form
   57,179.25/86,190.75 = 86,190.75/x
3. Step 3: Cross multiply
   57,179.25x = 86,190.75 × 86,190.75
4. Step 4: Simplify right side
   57,179.25x = 7,428,845,385.56
5. Step 5: Solve for x
   x = 7,428,845,385.56/57,179.25
6. Step 6: Final answer
   x = 129,922.05