Finding the Fourth Proportional to 120,247.39, 165,869.10 and 79,411.89

Step by Step Solution

1. Step 1: Write the proportion equation
   120,247.39 : 165,869.10 = 79,411.89 : x
2. Step 2: Convert to fraction form
   120,247.39/165,869.10 = 79,411.89/x
3. Step 3: Cross multiply
   120,247.39x = 165,869.10 × 79,411.89
4. Step 4: Simplify right side
   120,247.39x = 13,171,978,723.60
5. Step 5: Solve for x
   x = 13,171,978,723.60/120,247.39
6. Step 6: Final answer
   x = 109,540.66