Finding the Fourth Proportional to 144,831.04, 199,855.89 and 81,156.53

Step by Step Solution

1. Step 1: Write the proportion equation
   144,831.04 : 199,855.89 = 81,156.53 : x
2. Step 2: Convert to fraction form
   144,831.04/199,855.89 = 81,156.53/x
3. Step 3: Cross multiply
   144,831.04x = 199,855.89 × 81,156.53
4. Step 4: Simplify right side
   144,831.04x = 16,219,611,032.10
5. Step 5: Solve for x
   x = 16,219,611,032.10/144,831.04
6. Step 6: Final answer
   x = 111,989.88