Finding the Third Proportional to 87,494.50 and 128,143.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,494.50 : 128,143.50 = 128,143.50 : x
2. Step 2: Convert to fraction form
   87,494.50/128,143.50 = 128,143.50/x
3. Step 3: Cross multiply
   87,494.50x = 128,143.50 × 128,143.50
4. Step 4: Simplify right side
   87,494.50x = 16,420,756,592.25
5. Step 5: Solve for x
   x = 16,420,756,592.25/87,494.50
6. Step 6: Final answer
   x = 187,677.59