Finding the Fourth Proportional to 5,581.56, 8,371.52 and 2,118

Step by Step Solution

1. Step 1: Write the proportion equation
   5,581.56 : 8,371.52 = 2,118 : x
2. Step 2: Convert to fraction form
   5,581.56/8,371.52 = 2,118/x
3. Step 3: Cross multiply
   5,581.56x = 8,371.52 × 2,118
4. Step 4: Simplify right side
   5,581.56x = 17,730,879.36
5. Step 5: Solve for x
   x = 17,730,879.36/5,581.56
6. Step 6: Final answer
   x = 3,176.69