Finding the Third Proportional to 55,849.50 and 85,105.69

Step by Step Solution

1. Step 1: Write the proportion equation
   55,849.50 : 85,105.69 = 85,105.69 : x
2. Step 2: Convert to fraction form
   55,849.50/85,105.69 = 85,105.69/x
3. Step 3: Cross multiply
   55,849.50x = 85,105.69 × 85,105.69
4. Step 4: Simplify right side
   55,849.50x = 7,242,978,044.85
5. Step 5: Solve for x
   x = 7,242,978,044.85/55,849.50
6. Step 6: Final answer
   x = 129,687.43