Finding the Fourth Proportional to 2,561.84, 3,839.42 and 1,079.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.84 : 3,839.42 = 1,079.36 : x
2. Step 2: Convert to fraction form
   2,561.84/3,839.42 = 1,079.36/x
3. Step 3: Cross multiply
   2,561.84x = 3,839.42 × 1,079.36
4. Step 4: Simplify right side
   2,561.84x = 4,144,116.37
5. Step 5: Solve for x
   x = 4,144,116.37/2,561.84
6. Step 6: Final answer
   x = 1,617.63