Finding the Third Proportional to 39.16 and 55.61

Step by Step Solution

1. Step 1: Write the proportion equation
   39.16 : 55.61 = 55.61 : x
2. Step 2: Convert to fraction form
   39.16/55.61 = 55.61/x
3. Step 3: Cross multiply
   39.16x = 55.61 × 55.61
4. Step 4: Simplify right side
   39.16x = 3,092.29
5. Step 5: Solve for x
   x = 3,092.29/39.16
6. Step 6: Final answer
   x = 78.98