Finding the Third Proportional to 59,111.75 and 129,707.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,111.75 : 129,707.50 = 129,707.50 : x
2. Step 2: Convert to fraction form
   59,111.75/129,707.50 = 129,707.50/x
3. Step 3: Cross multiply
   59,111.75x = 129,707.50 × 129,707.50
4. Step 4: Simplify right side
   59,111.75x = 16,824,035,556.25
5. Step 5: Solve for x
   x = 16,824,035,556.25/59,111.75
6. Step 6: Final answer
   x = 284,614.07