Finding the Fourth Proportional to 10,411.50, 15,616.10 and 2,620.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,411.50 : 15,616.10 = 2,620.31 : x
2. Step 2: Convert to fraction form
   10,411.50/15,616.10 = 2,620.31/x
3. Step 3: Cross multiply
   10,411.50x = 15,616.10 × 2,620.31
4. Step 4: Simplify right side
   10,411.50x = 40,919,022.99
5. Step 5: Solve for x
   x = 40,919,022.99/10,411.50
6. Step 6: Final answer
   x = 3,930.18