Finding the Fourth Proportional to 120,019.68, 165,445.20 and 79,662.24

Step by Step Solution

1. Step 1: Write the proportion equation
   120,019.68 : 165,445.20 = 79,662.24 : x
2. Step 2: Convert to fraction form
   120,019.68/165,445.20 = 79,662.24/x
3. Step 3: Cross multiply
   120,019.68x = 165,445.20 × 79,662.24
4. Step 4: Simplify right side
   120,019.68x = 13,179,735,229.25
5. Step 5: Solve for x
   x = 13,179,735,229.25/120,019.68
6. Step 6: Final answer
   x = 109,813.12