Finding the Fourth Proportional to 1,864.43, 2,572.89 and 1,078.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,864.43 : 2,572.89 = 1,078.46 : x
2. Step 2: Convert to fraction form
   1,864.43/2,572.89 = 1,078.46/x
3. Step 3: Cross multiply
   1,864.43x = 2,572.89 × 1,078.46
4. Step 4: Simplify right side
   1,864.43x = 2,774,758.95
5. Step 5: Solve for x
   x = 2,774,758.95/1,864.43
6. Step 6: Final answer
   x = 1,488.26