Finding the Fourth Proportional to 99,875.15, 137,831.82 and 57,433.68

Step by Step Solution

1. Step 1: Write the proportion equation
   99,875.15 : 137,831.82 = 57,433.68 : x
2. Step 2: Convert to fraction form
   99,875.15/137,831.82 = 57,433.68/x
3. Step 3: Cross multiply
   99,875.15x = 137,831.82 × 57,433.68
4. Step 4: Simplify right side
   99,875.15x = 7,916,188,500.11
5. Step 5: Solve for x
   x = 7,916,188,500.11/99,875.15
6. Step 6: Final answer
   x = 79,260.84