Finding the Fourth Proportional to 2,558.94, 3,839.63 and 1,326.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.94 : 3,839.63 = 1,326.12 : x
2. Step 2: Convert to fraction form
   2,558.94/3,839.63 = 1,326.12/x
3. Step 3: Cross multiply
   2,558.94x = 3,839.63 × 1,326.12
4. Step 4: Simplify right side
   2,558.94x = 5,091,810.14
5. Step 5: Solve for x
   x = 5,091,810.14/2,558.94
6. Step 6: Final answer
   x = 1,989.81