Finding the Third Proportional to 39.87 and 59.17

Step by Step Solution

1. Step 1: Write the proportion equation
   39.87 : 59.17 = 59.17 : x
2. Step 2: Convert to fraction form
   39.87/59.17 = 59.17/x
3. Step 3: Cross multiply
   39.87x = 59.17 × 59.17
4. Step 4: Simplify right side
   39.87x = 3,500.85
5. Step 5: Solve for x
   x = 3,500.85/39.87
6. Step 6: Final answer
   x = 87.81