Finding the Third Proportional to 88,168.50 and 128,478

Step by Step Solution

1. Step 1: Write the proportion equation
   88,168.50 : 128,478 = 128,478 : x
2. Step 2: Convert to fraction form
   88,168.50/128,478 = 128,478/x
3. Step 3: Cross multiply
   88,168.50x = 128,478 × 128,478
4. Step 4: Simplify right side
   88,168.50x = 16,506,596,484
5. Step 5: Solve for x
   x = 16,506,596,484/88,168.50
6. Step 6: Final answer
   x = 187,216.48