Finding the Fourth Proportional to 99,153.73, 136,831.72 and 53,831.35

Step by Step Solution

1. Step 1: Write the proportion equation
   99,153.73 : 136,831.72 = 53,831.35 : x
2. Step 2: Convert to fraction form
   99,153.73/136,831.72 = 53,831.35/x
3. Step 3: Cross multiply
   99,153.73x = 136,831.72 × 53,831.35
4. Step 4: Simplify right side
   99,153.73x = 7,365,836,210.42
5. Step 5: Solve for x
   x = 7,365,836,210.42/99,153.73
6. Step 6: Final answer
   x = 74,287.03