Finding the Fourth Proportional to 10,411.69, 15,619.16 and 3,390.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,411.69 : 15,619.16 = 3,390.04 : x
2. Step 2: Convert to fraction form
   10,411.69/15,619.16 = 3,390.04/x
3. Step 3: Cross multiply
   10,411.69x = 15,619.16 × 3,390.04
4. Step 4: Simplify right side
   10,411.69x = 52,949,609.03
5. Step 5: Solve for x
   x = 52,949,609.03/10,411.69
6. Step 6: Final answer
   x = 5,085.59