Finding the Fourth Proportional to 99,826.86, 137,761.54 and 54,505.76

Step by Step Solution

1. Step 1: Write the proportion equation
   99,826.86 : 137,761.54 = 54,505.76 : x
2. Step 2: Convert to fraction form
   99,826.86/137,761.54 = 54,505.76/x
3. Step 3: Cross multiply
   99,826.86x = 137,761.54 × 54,505.76
4. Step 4: Simplify right side
   99,826.86x = 7,508,797,436.47
5. Step 5: Solve for x
   x = 7,508,797,436.47/99,826.86
6. Step 6: Final answer
   x = 75,218.21