Finding the Fourth Proportional to 7,279.52, 10,921.46 and 3,119.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,279.52 : 10,921.46 = 3,119.90 : x
2. Step 2: Convert to fraction form
   7,279.52/10,921.46 = 3,119.90/x
3. Step 3: Cross multiply
   7,279.52x = 10,921.46 × 3,119.90
4. Step 4: Simplify right side
   7,279.52x = 34,073,792.85
5. Step 5: Solve for x
   x = 34,073,792.85/7,279.52
6. Step 6: Final answer
   x = 4,680.78