Finding the Fourth Proportional to 99,699.27, 137,581.64 and 59,392.15

Step by Step Solution

1. Step 1: Write the proportion equation
   99,699.27 : 137,581.64 = 59,392.15 : x
2. Step 2: Convert to fraction form
   99,699.27/137,581.64 = 59,392.15/x
3. Step 3: Cross multiply
   99,699.27x = 137,581.64 × 59,392.15
4. Step 4: Simplify right side
   99,699.27x = 8,171,269,755.83
5. Step 5: Solve for x
   x = 8,171,269,755.83/99,699.27
6. Step 6: Final answer
   x = 81,959.17