Finding the Fourth Proportional to 1,865.46, 2,573.72 and 1,078.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,865.46 : 2,573.72 = 1,078.95 : x
2. Step 2: Convert to fraction form
   1,865.46/2,573.72 = 1,078.95/x
3. Step 3: Cross multiply
   1,865.46x = 2,573.72 × 1,078.95
4. Step 4: Simplify right side
   1,865.46x = 2,776,929.57
5. Step 5: Solve for x
   x = 2,776,929.57/1,865.46
6. Step 6: Final answer
   x = 1,488.60