Finding the Fourth Proportional to 10,928.60, 16,391.82 and 3,531

Step by Step Solution

1. Step 1: Write the proportion equation
   10,928.60 : 16,391.82 = 3,531 : x
2. Step 2: Convert to fraction form
   10,928.60/16,391.82 = 3,531/x
3. Step 3: Cross multiply
   10,928.60x = 16,391.82 × 3,531
4. Step 4: Simplify right side
   10,928.60x = 57,879,516.42
5. Step 5: Solve for x
   x = 57,879,516.42/10,928.60
6. Step 6: Final answer
   x = 5,296.15