Finding the Fourth Proportional to 1,555.96, 2,147.25 and 857.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.96 : 2,147.25 = 857.34 : x
2. Step 2: Convert to fraction form
   1,555.96/2,147.25 = 857.34/x
3. Step 3: Cross multiply
   1,555.96x = 2,147.25 × 857.34
4. Step 4: Simplify right side
   1,555.96x = 1,840,923.32
5. Step 5: Solve for x
   x = 1,840,923.32/1,555.96
6. Step 6: Final answer
   x = 1,183.14