Finding the Third Proportional to 39.84 and 56.16

Step by Step Solution

1. Step 1: Write the proportion equation
   39.84 : 56.16 = 56.16 : x
2. Step 2: Convert to fraction form
   39.84/56.16 = 56.16/x
3. Step 3: Cross multiply
   39.84x = 56.16 × 56.16
4. Step 4: Simplify right side
   39.84x = 3,153.52
5. Step 5: Solve for x
   x = 3,153.52/39.84
6. Step 6: Final answer
   x = 79.15