Finding the Third Proportional to 56.04 and 86.55

Step by Step Solution

1. Step 1: Write the proportion equation
   56.04 : 86.55 = 86.55 : x
2. Step 2: Convert to fraction form
   56.04/86.55 = 86.55/x
3. Step 3: Cross multiply
   56.04x = 86.55 × 86.55
4. Step 4: Simplify right side
   56.04x = 7,491.71
5. Step 5: Solve for x
   x = 7,491.71/56.04
6. Step 6: Final answer
   x = 133.69