Finding the Fourth Proportional to 8,518.56, 12,770.28 and 3,328.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,518.56 : 12,770.28 = 3,328.08 : x
2. Step 2: Convert to fraction form
   8,518.56/12,770.28 = 3,328.08/x
3. Step 3: Cross multiply
   8,518.56x = 12,770.28 × 3,328.08
4. Step 4: Simplify right side
   8,518.56x = 42,500,513.46
5. Step 5: Solve for x
   x = 42,500,513.46/8,518.56
6. Step 6: Final answer
   x = 4,989.17