Finding the Third Proportional to 88,171.88 and 128,566.69

Step by Step Solution

1. Step 1: Write the proportion equation
   88,171.88 : 128,566.69 = 128,566.69 : x
2. Step 2: Convert to fraction form
   88,171.88/128,566.69 = 128,566.69/x
3. Step 3: Cross multiply
   88,171.88x = 128,566.69 × 128,566.69
4. Step 4: Simplify right side
   88,171.88x = 16,529,393,134.72
5. Step 5: Solve for x
   x = 16,529,393,134.72/88,171.88
6. Step 6: Final answer
   x = 187,467.86