Finding the Fourth Proportional to 105,077.92, 145,061.04 and 81,150.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,077.92 : 145,061.04 = 81,150.88 : x
2. Step 2: Convert to fraction form
   105,077.92/145,061.04 = 81,150.88/x
3. Step 3: Cross multiply
   105,077.92x = 145,061.04 × 81,150.88
4. Step 4: Simplify right side
   105,077.92x = 11,771,831,049.72
5. Step 5: Solve for x
   x = 11,771,831,049.72/105,077.92
6. Step 6: Final answer
   x = 112,029.54