Finding the Fourth Proportional to 2,558.43, 3,834.47 and 1,326.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.43 : 3,834.47 = 1,326.15 : x
2. Step 2: Convert to fraction form
   2,558.43/3,834.47 = 1,326.15/x
3. Step 3: Cross multiply
   2,558.43x = 3,834.47 × 1,326.15
4. Step 4: Simplify right side
   2,558.43x = 5,085,085.71
5. Step 5: Solve for x
   x = 5,085,085.71/2,558.43
6. Step 6: Final answer
   x = 1,987.58