Finding the Fourth Proportional to 10,429.79, 15,641.37 and 3,408.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,429.79 : 15,641.37 = 3,408.21 : x
2. Step 2: Convert to fraction form
   10,429.79/15,641.37 = 3,408.21/x
3. Step 3: Cross multiply
   10,429.79x = 15,641.37 × 3,408.21
4. Step 4: Simplify right side
   10,429.79x = 53,309,073.65
5. Step 5: Solve for x
   x = 53,309,073.65/10,429.79
6. Step 6: Final answer
   x = 5,111.23