Finding the Fourth Proportional to 3,611.76, 5,418.69 and 1,078.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,611.76 : 5,418.69 = 1,078.92 : x
2. Step 2: Convert to fraction form
   3,611.76/5,418.69 = 1,078.92/x
3. Step 3: Cross multiply
   3,611.76x = 5,418.69 × 1,078.92
4. Step 4: Simplify right side
   3,611.76x = 5,846,333.01
5. Step 5: Solve for x
   x = 5,846,333.01/3,611.76
6. Step 6: Final answer
   x = 1,618.69