Finding the Fourth Proportional to 99,285.98, 137,017.98 and 58,442.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,285.98 : 137,017.98 = 58,442.72 : x
2. Step 2: Convert to fraction form
   99,285.98/137,017.98 = 58,442.72/x
3. Step 3: Cross multiply
   99,285.98x = 137,017.98 × 58,442.72
4. Step 4: Simplify right side
   99,285.98x = 8,007,702,755.02
5. Step 5: Solve for x
   x = 8,007,702,755.02/99,285.98
6. Step 6: Final answer
   x = 80,652.91