Finding the Fourth Proportional to 2,557.50, 3,834.21 and 1,325.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.50 : 3,834.21 = 1,325.10 : x
2. Step 2: Convert to fraction form
   2,557.50/3,834.21 = 1,325.10/x
3. Step 3: Cross multiply
   2,557.50x = 3,834.21 × 1,325.10
4. Step 4: Simplify right side
   2,557.50x = 5,080,711.67
5. Step 5: Solve for x
   x = 5,080,711.67/2,557.50
6. Step 6: Final answer
   x = 1,986.59