Finding the Fourth Proportional to 8,612.16, 12,918.72 and 2,456

Step by Step Solution

1. Step 1: Write the proportion equation
   8,612.16 : 12,918.72 = 2,456 : x
2. Step 2: Convert to fraction form
   8,612.16/12,918.72 = 2,456/x
3. Step 3: Cross multiply
   8,612.16x = 12,918.72 × 2,456
4. Step 4: Simplify right side
   8,612.16x = 31,728,376.32
5. Step 5: Solve for x
   x = 31,728,376.32/8,612.16
6. Step 6: Final answer
   x = 3,684.14