Finding the Fourth Proportional to 105,738.80, 145,843.04 and 89,798

Step by Step Solution

1. Step 1: Write the proportion equation
   105,738.80 : 145,843.04 = 89,798 : x
2. Step 2: Convert to fraction form
   105,738.80/145,843.04 = 89,798/x
3. Step 3: Cross multiply
   105,738.80x = 145,843.04 × 89,798
4. Step 4: Simplify right side
   105,738.80x = 13,096,413,305.92
5. Step 5: Solve for x
   x = 13,096,413,305.92/105,738.80
6. Step 6: Final answer
   x = 123,856.27