Finding the Fourth Proportional to 99,385.23, 137,155.28 and 56,951.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,385.23 : 137,155.28 = 56,951.96 : x
2. Step 2: Convert to fraction form
   99,385.23/137,155.28 = 56,951.96/x
3. Step 3: Cross multiply
   99,385.23x = 137,155.28 × 56,951.96
4. Step 4: Simplify right side
   99,385.23x = 7,811,262,078.48
5. Step 5: Solve for x
   x = 7,811,262,078.48/99,385.23
6. Step 6: Final answer
   x = 78,595.80