Finding the Third Proportional to 88,129.50 and 134,259.50

Step by Step Solution

1. Step 1: Write the proportion equation
   88,129.50 : 134,259.50 = 134,259.50 : x
2. Step 2: Convert to fraction form
   88,129.50/134,259.50 = 134,259.50/x
3. Step 3: Cross multiply
   88,129.50x = 134,259.50 × 134,259.50
4. Step 4: Simplify right side
   88,129.50x = 18,025,613,340.25
5. Step 5: Solve for x
   x = 18,025,613,340.25/88,129.50
6. Step 6: Final answer
   x = 204,535.52