Finding the Fourth Proportional to 2,604.78, 3,906.39 and 1,418.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,604.78 : 3,906.39 = 1,418.63 : x
2. Step 2: Convert to fraction form
   2,604.78/3,906.39 = 1,418.63/x
3. Step 3: Cross multiply
   2,604.78x = 3,906.39 × 1,418.63
4. Step 4: Simplify right side
   2,604.78x = 5,541,695.42
5. Step 5: Solve for x
   x = 5,541,695.42/2,604.78
6. Step 6: Final answer
   x = 2,127.51