Finding the Fourth Proportional to 2,078.78, 3,117.20 and 1,104.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.78 : 3,117.20 = 1,104.62 : x
2. Step 2: Convert to fraction form
   2,078.78/3,117.20 = 1,104.62/x
3. Step 3: Cross multiply
   2,078.78x = 3,117.20 × 1,104.62
4. Step 4: Simplify right side
   2,078.78x = 3,443,300.35
5. Step 5: Solve for x
   x = 3,443,300.35/2,078.78
6. Step 6: Final answer
   x = 1,656.41