Finding the Fourth Proportional to 144,920.38, 199,987.58 and 81,257.98

Step by Step Solution

1. Step 1: Write the proportion equation
   144,920.38 : 199,987.58 = 81,257.98 : x
2. Step 2: Convert to fraction form
   144,920.38/199,987.58 = 81,257.98/x
3. Step 3: Cross multiply
   144,920.38x = 199,987.58 × 81,257.98
4. Step 4: Simplify right side
   144,920.38x = 16,250,586,775.89
5. Step 5: Solve for x
   x = 16,250,586,775.89/144,920.38
6. Step 6: Final answer
   x = 112,134.59