Finding the Fourth Proportional to 8,213.39, 12,328.86 and 3,535.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,213.39 : 12,328.86 = 3,535.72 : x
2. Step 2: Convert to fraction form
   8,213.39/12,328.86 = 3,535.72/x
3. Step 3: Cross multiply
   8,213.39x = 12,328.86 × 3,535.72
4. Step 4: Simplify right side
   8,213.39x = 43,591,352.80
5. Step 5: Solve for x
   x = 43,591,352.80/8,213.39
6. Step 6: Final answer
   x = 5,307.35