Finding the Fourth Proportional to 99,282.39, 137,012.76 and 56,854.59

Step by Step Solution

1. Step 1: Write the proportion equation
   99,282.39 : 137,012.76 = 56,854.59 : x
2. Step 2: Convert to fraction form
   99,282.39/137,012.76 = 56,854.59/x
3. Step 3: Cross multiply
   99,282.39x = 137,012.76 × 56,854.59
4. Step 4: Simplify right side
   99,282.39x = 7,789,804,294.57
5. Step 5: Solve for x
   x = 7,789,804,294.57/99,282.39
6. Step 6: Final answer
   x = 78,461.09