Finding the Third Proportional to 81,355.50 and 123,180.75

Step by Step Solution

1. Step 1: Write the proportion equation
   81,355.50 : 123,180.75 = 123,180.75 : x
2. Step 2: Convert to fraction form
   81,355.50/123,180.75 = 123,180.75/x
3. Step 3: Cross multiply
   81,355.50x = 123,180.75 × 123,180.75
4. Step 4: Simplify right side
   81,355.50x = 15,173,497,170.56
5. Step 5: Solve for x
   x = 15,173,497,170.56/81,355.50
6. Step 6: Final answer
   x = 186,508.56