Finding the Fourth Proportional to 2,558.06, 3,839.20 and 1,325.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.06 : 3,839.20 = 1,325.86 : x
2. Step 2: Convert to fraction form
   2,558.06/3,839.20 = 1,325.86/x
3. Step 3: Cross multiply
   2,558.06x = 3,839.20 × 1,325.86
4. Step 4: Simplify right side
   2,558.06x = 5,090,241.71
5. Step 5: Solve for x
   x = 5,090,241.71/2,558.06
6. Step 6: Final answer
   x = 1,989.88