Finding the Fourth Proportional to 79,431.80, 109,667.20 and 49,249.18

Step by Step Solution

1. Step 1: Write the proportion equation
   79,431.80 : 109,667.20 = 49,249.18 : x
2. Step 2: Convert to fraction form
   79,431.80/109,667.20 = 49,249.18/x
3. Step 3: Cross multiply
   79,431.80x = 109,667.20 × 49,249.18
4. Step 4: Simplify right side
   79,431.80x = 5,401,019,672.90
5. Step 5: Solve for x
   x = 5,401,019,672.90/79,431.80
6. Step 6: Final answer
   x = 67,995.69