Finding the Fourth Proportional to 13,302.81, 19,957.15 and 3,943.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,302.81 : 19,957.15 = 3,943.57 : x
2. Step 2: Convert to fraction form
   13,302.81/19,957.15 = 3,943.57/x
3. Step 3: Cross multiply
   13,302.81x = 19,957.15 × 3,943.57
4. Step 4: Simplify right side
   13,302.81x = 78,702,418.03
5. Step 5: Solve for x
   x = 78,702,418.03/13,302.81
6. Step 6: Final answer
   x = 5,916.23