Finding the Fourth Proportional to 5,279.28, 7,278.82 and 3,861.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,279.28 : 7,278.82 = 3,861.82 : x
2. Step 2: Convert to fraction form
   5,279.28/7,278.82 = 3,861.82/x
3. Step 3: Cross multiply
   5,279.28x = 7,278.82 × 3,861.82
4. Step 4: Simplify right side
   5,279.28x = 28,109,492.65
5. Step 5: Solve for x
   x = 28,109,492.65/5,279.28
6. Step 6: Final answer
   x = 5,324.49