Finding the Fourth Proportional to 1,863.56, 2,571.72 and 1,078.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.56 : 2,571.72 = 1,078.07 : x
2. Step 2: Convert to fraction form
   1,863.56/2,571.72 = 1,078.07/x
3. Step 3: Cross multiply
   1,863.56x = 2,571.72 × 1,078.07
4. Step 4: Simplify right side
   1,863.56x = 2,772,477.28
5. Step 5: Solve for x
   x = 2,772,477.28/1,863.56
6. Step 6: Final answer
   x = 1,487.73