Finding the Third Proportional to 18,502.88 and 39,921.75

Step by Step Solution

1. Step 1: Write the proportion equation
   18,502.88 : 39,921.75 = 39,921.75 : x
2. Step 2: Convert to fraction form
   18,502.88/39,921.75 = 39,921.75/x
3. Step 3: Cross multiply
   18,502.88x = 39,921.75 × 39,921.75
4. Step 4: Simplify right side
   18,502.88x = 1,593,746,123.06
5. Step 5: Solve for x
   x = 1,593,746,123.06/18,502.88
6. Step 6: Final answer
   x = 86,135.05