Finding the Fourth Proportional to 109,105.64, 150,390.24 and 81,465.61

Step by Step Solution

1. Step 1: Write the proportion equation
   109,105.64 : 150,390.24 = 81,465.61 : x
2. Step 2: Convert to fraction form
   109,105.64/150,390.24 = 81,465.61/x
3. Step 3: Cross multiply
   109,105.64x = 150,390.24 × 81,465.61
4. Step 4: Simplify right side
   109,105.64x = 12,251,632,639.65
5. Step 5: Solve for x
   x = 12,251,632,639.65/109,105.64
6. Step 6: Final answer
   x = 112,291.47