Finding the Fourth Proportional to 8,978.40, 13,465.68 and 2,819.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.40 : 13,465.68 = 2,819.04 : x
2. Step 2: Convert to fraction form
   8,978.40/13,465.68 = 2,819.04/x
3. Step 3: Cross multiply
   8,978.40x = 13,465.68 × 2,819.04
4. Step 4: Simplify right side
   8,978.40x = 37,960,290.55
5. Step 5: Solve for x
   x = 37,960,290.55/8,978.40
6. Step 6: Final answer
   x = 4,227.96