Finding the Fourth Proportional to 99,826.80, 137,751 and 55,111.92

Step by Step Solution

1. Step 1: Write the proportion equation
   99,826.80 : 137,751 = 55,111.92 : x
2. Step 2: Convert to fraction form
   99,826.80/137,751 = 55,111.92/x
3. Step 3: Cross multiply
   99,826.80x = 137,751 × 55,111.92
4. Step 4: Simplify right side
   99,826.80x = 7,591,722,091.92
5. Step 5: Solve for x
   x = 7,591,722,091.92/99,826.80
6. Step 6: Final answer
   x = 76,048.94