Finding the Fourth Proportional to 8,521.36, 12,785.82 and 3,325.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,521.36 : 12,785.82 = 3,325.48 : x
2. Step 2: Convert to fraction form
   8,521.36/12,785.82 = 3,325.48/x
3. Step 3: Cross multiply
   8,521.36x = 12,785.82 × 3,325.48
4. Step 4: Simplify right side
   8,521.36x = 42,518,988.69
5. Step 5: Solve for x
   x = 42,518,988.69/8,521.36
6. Step 6: Final answer
   x = 4,989.70