Finding the Fourth Proportional to 3,543.90, 5,314.31 and 1,078.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,543.90 : 5,314.31 = 1,078.15 : x
2. Step 2: Convert to fraction form
   3,543.90/5,314.31 = 1,078.15/x
3. Step 3: Cross multiply
   3,543.90x = 5,314.31 × 1,078.15
4. Step 4: Simplify right side
   3,543.90x = 5,729,596.75
5. Step 5: Solve for x
   x = 5,729,596.75/3,543.90
6. Step 6: Final answer
   x = 1,616.75