Finding the Third Proportional to 57,357 and 86,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,357 : 86,899.50 = 86,899.50 : x
2. Step 2: Convert to fraction form
   57,357/86,899.50 = 86,899.50/x
3. Step 3: Cross multiply
   57,357x = 86,899.50 × 86,899.50
4. Step 4: Simplify right side
   57,357x = 7,551,523,100.25
5. Step 5: Solve for x
   x = 7,551,523,100.25/57,357
6. Step 6: Final answer
   x = 131,658.26