Finding the Third Proportional to 87,435.50 and 128,254

Step by Step Solution

1. Step 1: Write the proportion equation
   87,435.50 : 128,254 = 128,254 : x
2. Step 2: Convert to fraction form
   87,435.50/128,254 = 128,254/x
3. Step 3: Cross multiply
   87,435.50x = 128,254 × 128,254
4. Step 4: Simplify right side
   87,435.50x = 16,449,088,516
5. Step 5: Solve for x
   x = 16,449,088,516/87,435.50
6. Step 6: Final answer
   x = 188,128.26