Finding the Fourth Proportional to 99,153.49, 136,831.98 and 53,831.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,153.49 : 136,831.98 = 53,831.47 : x
2. Step 2: Convert to fraction form
   99,153.49/136,831.98 = 53,831.47/x
3. Step 3: Cross multiply
   99,153.49x = 136,831.98 × 53,831.47
4. Step 4: Simplify right side
   99,153.49x = 7,365,866,626.41
5. Step 5: Solve for x
   x = 7,365,866,626.41/99,153.49
6. Step 6: Final answer
   x = 74,287.52