Finding the Fourth Proportional to 99,863.96, 137,823.54 and 56,854.04

Step by Step Solution

1. Step 1: Write the proportion equation
   99,863.96 : 137,823.54 = 56,854.04 : x
2. Step 2: Convert to fraction form
   99,863.96/137,823.54 = 56,854.04/x
3. Step 3: Cross multiply
   99,863.96x = 137,823.54 × 56,854.04
4. Step 4: Simplify right side
   99,863.96x = 7,835,825,056.10
5. Step 5: Solve for x
   x = 7,835,825,056.10/99,863.96
6. Step 6: Final answer
   x = 78,464.99