Finding the Fourth Proportional to 2,002.78, 2,763.76 and 1,118.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.78 : 2,763.76 = 1,118.54 : x
2. Step 2: Convert to fraction form
   2,002.78/2,763.76 = 1,118.54/x
3. Step 3: Cross multiply
   2,002.78x = 2,763.76 × 1,118.54
4. Step 4: Simplify right side
   2,002.78x = 3,091,376.11
5. Step 5: Solve for x
   x = 3,091,376.11/2,002.78
6. Step 6: Final answer
   x = 1,543.54