Finding the Fourth Proportional to 2,558.12, 3,839.23 and 1,325.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.12 : 3,839.23 = 1,325.88 : x
2. Step 2: Convert to fraction form
   2,558.12/3,839.23 = 1,325.88/x
3. Step 3: Cross multiply
   2,558.12x = 3,839.23 × 1,325.88
4. Step 4: Simplify right side
   2,558.12x = 5,090,354.34
5. Step 5: Solve for x
   x = 5,090,354.34/2,558.12
6. Step 6: Final answer
   x = 1,989.88