Finding the Third Proportional to 55,080 and 85,500

Step by Step Solution

1. Step 1: Write the proportion equation
   55,080 : 85,500 = 85,500 : x
2. Step 2: Convert to fraction form
   55,080/85,500 = 85,500/x
3. Step 3: Cross multiply
   55,080x = 85,500 × 85,500
4. Step 4: Simplify right side
   55,080x = 7,310,250,000
5. Step 5: Solve for x
   x = 7,310,250,000/55,080
6. Step 6: Final answer
   x = 132,720.59