Finding the Fourth Proportional to 8,522.16, 12,783.82 and 2,679.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,522.16 : 12,783.82 = 2,679.20 : x
2. Step 2: Convert to fraction form
   8,522.16/12,783.82 = 2,679.20/x
3. Step 3: Cross multiply
   8,522.16x = 12,783.82 × 2,679.20
4. Step 4: Simplify right side
   8,522.16x = 34,250,410.54
5. Step 5: Solve for x
   x = 34,250,410.54/8,522.16
6. Step 6: Final answer
   x = 4,018.98