Finding the Fourth Proportional to 1,555.46, 2,146.56 and 856.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.46 : 2,146.56 = 856.82 : x
2. Step 2: Convert to fraction form
   1,555.46/2,146.56 = 856.82/x
3. Step 3: Cross multiply
   1,555.46x = 2,146.56 × 856.82
4. Step 4: Simplify right side
   1,555.46x = 1,839,215.54
5. Step 5: Solve for x
   x = 1,839,215.54/1,555.46
6. Step 6: Final answer
   x = 1,182.43