Finding the Fourth Proportional to 1,478.52, 2,040.56 and 857.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.52 : 2,040.56 = 857.88 : x
2. Step 2: Convert to fraction form
   1,478.52/2,040.56 = 857.88/x
3. Step 3: Cross multiply
   1,478.52x = 2,040.56 × 857.88
4. Step 4: Simplify right side
   1,478.52x = 1,750,555.61
5. Step 5: Solve for x
   x = 1,750,555.61/1,478.52
6. Step 6: Final answer
   x = 1,183.99