Finding the Fourth Proportional to 81,105.94, 120,909.20 and 79,827.76

Step by Step Solution

1. Step 1: Write the proportion equation
   81,105.94 : 120,909.20 = 79,827.76 : x
2. Step 2: Convert to fraction form
   81,105.94/120,909.20 = 79,827.76/x
3. Step 3: Cross multiply
   81,105.94x = 120,909.20 × 79,827.76
4. Step 4: Simplify right side
   81,105.94x = 9,651,910,599.39
5. Step 5: Solve for x
   x = 9,651,910,599.39/81,105.94
6. Step 6: Final answer
   x = 119,003.74