Finding the Fourth Proportional to 99,831.46, 137,773 and 54,513.66

Step by Step Solution

1. Step 1: Write the proportion equation
   99,831.46 : 137,773 = 54,513.66 : x
2. Step 2: Convert to fraction form
   99,831.46/137,773 = 54,513.66/x
3. Step 3: Cross multiply
   99,831.46x = 137,773 × 54,513.66
4. Step 4: Simplify right side
   99,831.46x = 7,510,510,479.18
5. Step 5: Solve for x
   x = 7,510,510,479.18/99,831.46
6. Step 6: Final answer
   x = 75,231.90