Finding the Fourth Proportional to 2,619.28, 3,925.59 and 1,229.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.28 : 3,925.59 = 1,229.56 : x
2. Step 2: Convert to fraction form
   2,619.28/3,925.59 = 1,229.56/x
3. Step 3: Cross multiply
   2,619.28x = 3,925.59 × 1,229.56
4. Step 4: Simplify right side
   2,619.28x = 4,826,748.44
5. Step 5: Solve for x
   x = 4,826,748.44/2,619.28
6. Step 6: Final answer
   x = 1,842.78