Finding the Fourth Proportional to 2,613.30, 3,919.92 and 1,053.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.30 : 3,919.92 = 1,053.27 : x
2. Step 2: Convert to fraction form
   2,613.30/3,919.92 = 1,053.27/x
3. Step 3: Cross multiply
   2,613.30x = 3,919.92 × 1,053.27
4. Step 4: Simplify right side
   2,613.30x = 4,128,733.15
5. Step 5: Solve for x
   x = 4,128,733.15/2,613.30
6. Step 6: Final answer
   x = 1,579.89