Finding the Fourth Proportional to 8,368.62, 12,549.72 and 2,820.47

Step by Step Solution

1. Step 1: Write the proportion equation
   8,368.62 : 12,549.72 = 2,820.47 : x
2. Step 2: Convert to fraction form
   8,368.62/12,549.72 = 2,820.47/x
3. Step 3: Cross multiply
   8,368.62x = 12,549.72 × 2,820.47
4. Step 4: Simplify right side
   8,368.62x = 35,396,046.02
5. Step 5: Solve for x
   x = 35,396,046.02/8,368.62
6. Step 6: Final answer
   x = 4,229.62