Finding the Fourth Proportional to 3,159.35, 4,737.87 and 1,078.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,159.35 : 4,737.87 = 1,078.80 : x
2. Step 2: Convert to fraction form
   3,159.35/4,737.87 = 1,078.80/x
3. Step 3: Cross multiply
   3,159.35x = 4,737.87 × 1,078.80
4. Step 4: Simplify right side
   3,159.35x = 5,111,190.47
5. Step 5: Solve for x
   x = 5,111,190.47/3,159.35
6. Step 6: Final answer
   x = 1,617.80