Finding the Fourth Proportional to 9,915.78, 14,872.08 and 2,894.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,915.78 : 14,872.08 = 2,894.15 : x
2. Step 2: Convert to fraction form
   9,915.78/14,872.08 = 2,894.15/x
3. Step 3: Cross multiply
   9,915.78x = 14,872.08 × 2,894.15
4. Step 4: Simplify right side
   9,915.78x = 43,042,030.33
5. Step 5: Solve for x
   x = 43,042,030.33/9,915.78
6. Step 6: Final answer
   x = 4,340.76