Finding the Fourth Proportional to 10,806.72, 16,209.24 and 3,411.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,806.72 : 16,209.24 = 3,411.40 : x
2. Step 2: Convert to fraction form
   10,806.72/16,209.24 = 3,411.40/x
3. Step 3: Cross multiply
   10,806.72x = 16,209.24 × 3,411.40
4. Step 4: Simplify right side
   10,806.72x = 55,296,201.34
5. Step 5: Solve for x
   x = 55,296,201.34/10,806.72
6. Step 6: Final answer
   x = 5,116.83