Finding the Fourth Proportional to 3,921.89, 5,881.53 and 1,581.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.89 : 5,881.53 = 1,581.29 : x
2. Step 2: Convert to fraction form
   3,921.89/5,881.53 = 1,581.29/x
3. Step 3: Cross multiply
   3,921.89x = 5,881.53 × 1,581.29
4. Step 4: Simplify right side
   3,921.89x = 9,300,404.57
5. Step 5: Solve for x
   x = 9,300,404.57/3,921.89
6. Step 6: Final answer
   x = 2,371.41