Finding the Fourth Proportional to 144,830.78, 199,874.37 and 81,189.02

Step by Step Solution

1. Step 1: Write the proportion equation
   144,830.78 : 199,874.37 = 81,189.02 : x
2. Step 2: Convert to fraction form
   144,830.78/199,874.37 = 81,189.02/x
3. Step 3: Cross multiply
   144,830.78x = 199,874.37 × 81,189.02
4. Step 4: Simplify right side
   144,830.78x = 16,227,604,223.42
5. Step 5: Solve for x
   x = 16,227,604,223.42/144,830.78
6. Step 6: Final answer
   x = 112,045.27