Finding the Fourth Proportional to 8,411.98, 12,618.54 and 2,488.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,411.98 : 12,618.54 = 2,488.78 : x
2. Step 2: Convert to fraction form
   8,411.98/12,618.54 = 2,488.78/x
3. Step 3: Cross multiply
   8,411.98x = 12,618.54 × 2,488.78
4. Step 4: Simplify right side
   8,411.98x = 31,404,769.98
5. Step 5: Solve for x
   x = 31,404,769.98/8,411.98
6. Step 6: Final answer
   x = 3,733.34