Finding the Third Proportional to 59.88 and 87.31

Step by Step Solution

1. Step 1: Write the proportion equation
   59.88 : 87.31 = 87.31 : x
2. Step 2: Convert to fraction form
   59.88/87.31 = 87.31/x
3. Step 3: Cross multiply
   59.88x = 87.31 × 87.31
4. Step 4: Simplify right side
   59.88x = 7,623.47
5. Step 5: Solve for x
   x = 7,623.47/59.88
6. Step 6: Final answer
   x = 127.32