Finding the Third Proportional to 55,434 and 85,612

Step by Step Solution

1. Step 1: Write the proportion equation
   55,434 : 85,612 = 85,612 : x
2. Step 2: Convert to fraction form
   55,434/85,612 = 85,612/x
3. Step 3: Cross multiply
   55,434x = 85,612 × 85,612
4. Step 4: Simplify right side
   55,434x = 7,329,414,544
5. Step 5: Solve for x
   x = 7,329,414,544/55,434
6. Step 6: Final answer
   x = 132,218.76