Finding the Fourth Proportional to 5,131.20, 7,079.16 and 3,363.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.20 : 7,079.16 = 3,363.78 : x
2. Step 2: Convert to fraction form
   5,131.20/7,079.16 = 3,363.78/x
3. Step 3: Cross multiply
   5,131.20x = 7,079.16 × 3,363.78
4. Step 4: Simplify right side
   5,131.20x = 23,812,736.82
5. Step 5: Solve for x
   x = 23,812,736.82/5,131.20
6. Step 6: Final answer
   x = 4,640.77