Finding the Fourth Proportional to 105,073.92, 145,055.52 and 81,146.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,073.92 : 145,055.52 = 81,146.88 : x
2. Step 2: Convert to fraction form
   105,073.92/145,055.52 = 81,146.88/x
3. Step 3: Cross multiply
   105,073.92x = 145,055.52 × 81,146.88
4. Step 4: Simplify right side
   105,073.92x = 11,770,802,874.78
5. Step 5: Solve for x
   x = 11,770,802,874.78/105,073.92
6. Step 6: Final answer
   x = 112,024.02