Finding the Third Proportional to 87,700.50 and 128,268

Step by Step Solution

1. Step 1: Write the proportion equation
   87,700.50 : 128,268 = 128,268 : x
2. Step 2: Convert to fraction form
   87,700.50/128,268 = 128,268/x
3. Step 3: Cross multiply
   87,700.50x = 128,268 × 128,268
4. Step 4: Simplify right side
   87,700.50x = 16,452,679,824
5. Step 5: Solve for x
   x = 16,452,679,824/87,700.50
6. Step 6: Final answer
   x = 187,600.75