Finding the Fourth Proportional to 144,810.42, 199,836.45 and 81,149.46

Step by Step Solution

1. Step 1: Write the proportion equation
   144,810.42 : 199,836.45 = 81,149.46 : x
2. Step 2: Convert to fraction form
   144,810.42/199,836.45 = 81,149.46/x
3. Step 3: Cross multiply
   144,810.42x = 199,836.45 × 81,149.46
4. Step 4: Simplify right side
   144,810.42x = 16,216,620,005.82
5. Step 5: Solve for x
   x = 16,216,620,005.82/144,810.42
6. Step 6: Final answer
   x = 111,985.17