Finding the Third Proportional to 81,850.50 and 123,909.75

Step by Step Solution

1. Step 1: Write the proportion equation
   81,850.50 : 123,909.75 = 123,909.75 : x
2. Step 2: Convert to fraction form
   81,850.50/123,909.75 = 123,909.75/x
3. Step 3: Cross multiply
   81,850.50x = 123,909.75 × 123,909.75
4. Step 4: Simplify right side
   81,850.50x = 15,353,626,145.06
5. Step 5: Solve for x
   x = 15,353,626,145.06/81,850.50
6. Step 6: Final answer
   x = 187,581.34