Finding the Third Proportional to 81,108 and 108,492.75

Step by Step Solution

1. Step 1: Write the proportion equation
   81,108 : 108,492.75 = 108,492.75 : x
2. Step 2: Convert to fraction form
   81,108/108,492.75 = 108,492.75/x
3. Step 3: Cross multiply
   81,108x = 108,492.75 × 108,492.75
4. Step 4: Simplify right side
   81,108x = 11,770,676,802.56
5. Step 5: Solve for x
   x = 11,770,676,802.56/81,108
6. Step 6: Final answer
   x = 145,123.50