Finding the Fourth Proportional to 81,042.12, 111,826.98 and 45,228.78

Step by Step Solution

1. Step 1: Write the proportion equation
   81,042.12 : 111,826.98 = 45,228.78 : x
2. Step 2: Convert to fraction form
   81,042.12/111,826.98 = 45,228.78/x
3. Step 3: Cross multiply
   81,042.12x = 111,826.98 × 45,228.78
4. Step 4: Simplify right side
   81,042.12x = 5,057,797,876.48
5. Step 5: Solve for x
   x = 5,057,797,876.48/81,042.12
6. Step 6: Final answer
   x = 62,409.50