Finding the Fourth Proportional to 10,411.21, 15,615.18 and 3,391.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,411.21 : 15,615.18 = 3,391.48 : x
2. Step 2: Convert to fraction form
   10,411.21/15,615.18 = 3,391.48/x
3. Step 3: Cross multiply
   10,411.21x = 15,615.18 × 3,391.48
4. Step 4: Simplify right side
   10,411.21x = 52,958,570.67
5. Step 5: Solve for x
   x = 52,958,570.67/10,411.21
6. Step 6: Final answer
   x = 5,086.69