Finding the Fourth Proportional to 2,778.58, 4,168.59 and 1,047.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.58 : 4,168.59 = 1,047.22 : x
2. Step 2: Convert to fraction form
   2,778.58/4,168.59 = 1,047.22/x
3. Step 3: Cross multiply
   2,778.58x = 4,168.59 × 1,047.22
4. Step 4: Simplify right side
   2,778.58x = 4,365,430.82
5. Step 5: Solve for x
   x = 4,365,430.82/2,778.58
6. Step 6: Final answer
   x = 1,571.10