Finding the Third Proportional to 42.71 and 60.87

Step by Step Solution

1. Step 1: Write the proportion equation
   42.71 : 60.87 = 60.87 : x
2. Step 2: Convert to fraction form
   42.71/60.87 = 60.87/x
3. Step 3: Cross multiply
   42.71x = 60.87 × 60.87
4. Step 4: Simplify right side
   42.71x = 3,704.99
5. Step 5: Solve for x
   x = 3,704.99/42.71
6. Step 6: Final answer
   x = 86.74