Finding the Third Proportional to 90,216.50 and 139,676

Step by Step Solution

1. Step 1: Write the proportion equation
   90,216.50 : 139,676 = 139,676 : x
2. Step 2: Convert to fraction form
   90,216.50/139,676 = 139,676/x
3. Step 3: Cross multiply
   90,216.50x = 139,676 × 139,676
4. Step 4: Simplify right side
   90,216.50x = 19,509,384,976
5. Step 5: Solve for x
   x = 19,509,384,976/90,216.50
6. Step 6: Final answer
   x = 216,250.74