Finding the Fourth Proportional to 5,721.66, 7,898.31 and 3,861.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,721.66 : 7,898.31 = 3,861.18 : x
2. Step 2: Convert to fraction form
   5,721.66/7,898.31 = 3,861.18/x
3. Step 3: Cross multiply
   5,721.66x = 7,898.31 × 3,861.18
4. Step 4: Simplify right side
   5,721.66x = 30,496,796.61
5. Step 5: Solve for x
   x = 30,496,796.61/5,721.66
6. Step 6: Final answer
   x = 5,330.06