Finding the Fourth Proportional to 5,581.56, 8,372.53 and 2,806.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,581.56 : 8,372.53 = 2,806.72 : x
2. Step 2: Convert to fraction form
   5,581.56/8,372.53 = 2,806.72/x
3. Step 3: Cross multiply
   5,581.56x = 8,372.53 × 2,806.72
4. Step 4: Simplify right side
   5,581.56x = 23,499,329.98
5. Step 5: Solve for x
   x = 23,499,329.98/5,581.56
6. Step 6: Final answer
   x = 4,210.17