Finding the Fourth Proportional to 3,916.71, 5,861.03 and 3,391.43

Step by Step Solution

1. Step 1: Write the proportion equation
   3,916.71 : 5,861.03 = 3,391.43 : x
2. Step 2: Convert to fraction form
   3,916.71/5,861.03 = 3,391.43/x
3. Step 3: Cross multiply
   3,916.71x = 5,861.03 × 3,391.43
4. Step 4: Simplify right side
   3,916.71x = 19,877,288.29
5. Step 5: Solve for x
   x = 19,877,288.29/3,916.71
6. Step 6: Final answer
   x = 5,074.99