Finding the Fourth Proportional to 2,873.78, 4,309.56 and 1,118.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,873.78 : 4,309.56 = 1,118.55 : x
2. Step 2: Convert to fraction form
   2,873.78/4,309.56 = 1,118.55/x
3. Step 3: Cross multiply
   2,873.78x = 4,309.56 × 1,118.55
4. Step 4: Simplify right side
   2,873.78x = 4,820,458.34
5. Step 5: Solve for x
   x = 4,820,458.34/2,873.78
6. Step 6: Final answer
   x = 1,677.40