Finding the Third Proportional to 55,415.39 and 81,158.20

Step by Step Solution

1. Step 1: Write the proportion equation
   55,415.39 : 81,158.20 = 81,158.20 : x
2. Step 2: Convert to fraction form
   55,415.39/81,158.20 = 81,158.20/x
3. Step 3: Cross multiply
   55,415.39x = 81,158.20 × 81,158.20
4. Step 4: Simplify right side
   55,415.39x = 6,586,653,934.48
5. Step 5: Solve for x
   x = 6,586,653,934.48/55,415.39
6. Step 6: Final answer
   x = 118,859.65