Finding the Fourth Proportional to 144,738.57, 199,836.69 and 90,373.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,738.57 : 199,836.69 = 90,373.50 : x
2. Step 2: Convert to fraction form
   144,738.57/199,836.69 = 90,373.50/x
3. Step 3: Cross multiply
   144,738.57x = 199,836.69 × 90,373.50
4. Step 4: Simplify right side
   144,738.57x = 18,059,941,103.72
5. Step 5: Solve for x
   x = 18,059,941,103.72/144,738.57
6. Step 6: Final answer
   x = 124,776.29