Finding the Fourth Proportional to 109,105.89, 150,390.59 and 81,465.86

Step by Step Solution

1. Step 1: Write the proportion equation
   109,105.89 : 150,390.59 = 81,465.86 : x
2. Step 2: Convert to fraction form
   109,105.89/150,390.59 = 81,465.86/x
3. Step 3: Cross multiply
   109,105.89x = 150,390.59 × 81,465.86
4. Step 4: Simplify right side
   109,105.89x = 12,251,697,590.98
5. Step 5: Solve for x
   x = 12,251,697,590.98/109,105.89
6. Step 6: Final answer
   x = 112,291.81