Finding the Fourth Proportional to 2,555.21, 3,834.29 and 1,074.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.21 : 3,834.29 = 1,074.31 : x
2. Step 2: Convert to fraction form
   2,555.21/3,834.29 = 1,074.31/x
3. Step 3: Cross multiply
   2,555.21x = 3,834.29 × 1,074.31
4. Step 4: Simplify right side
   2,555.21x = 4,119,228.74
5. Step 5: Solve for x
   x = 4,119,228.74/2,555.21
6. Step 6: Final answer
   x = 1,612.09