Finding the Third Proportional to 109,545.75 and 139,531.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,545.75 : 139,531.50 = 139,531.50 : x
2. Step 2: Convert to fraction form
   109,545.75/139,531.50 = 139,531.50/x
3. Step 3: Cross multiply
   109,545.75x = 139,531.50 × 139,531.50
4. Step 4: Simplify right side
   109,545.75x = 19,469,039,492.25
5. Step 5: Solve for x
   x = 19,469,039,492.25/109,545.75
6. Step 6: Final answer
   x = 177,725.19