Finding the Third Proportional to 87,450.75 and 139,061.25

Step by Step Solution

1. Step 1: Write the proportion equation
   87,450.75 : 139,061.25 = 139,061.25 : x
2. Step 2: Convert to fraction form
   87,450.75/139,061.25 = 139,061.25/x
3. Step 3: Cross multiply
   87,450.75x = 139,061.25 × 139,061.25
4. Step 4: Simplify right side
   87,450.75x = 19,338,031,251.56
5. Step 5: Solve for x
   x = 19,338,031,251.56/87,450.75
6. Step 6: Final answer
   x = 221,130.54