Finding the Fourth Proportional to 81,145.50, 111,958.55 and 55,658.17

Step by Step Solution

1. Step 1: Write the proportion equation
   81,145.50 : 111,958.55 = 55,658.17 : x
2. Step 2: Convert to fraction form
   81,145.50/111,958.55 = 55,658.17/x
3. Step 3: Cross multiply
   81,145.50x = 111,958.55 × 55,658.17
4. Step 4: Simplify right side
   81,145.50x = 6,231,407,730.56
5. Step 5: Solve for x
   x = 6,231,407,730.56/81,145.50
6. Step 6: Final answer
   x = 76,793.02