Finding the Fourth Proportional to 2,778.49, 4,168.55 and 1,047.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.49 : 4,168.55 = 1,047.25 : x
2. Step 2: Convert to fraction form
   2,778.49/4,168.55 = 1,047.25/x
3. Step 3: Cross multiply
   2,778.49x = 4,168.55 × 1,047.25
4. Step 4: Simplify right side
   2,778.49x = 4,365,513.99
5. Step 5: Solve for x
   x = 4,365,513.99/2,778.49
6. Step 6: Final answer
   x = 1,571.18