Finding the Fourth Proportional to 1,555.45, 2,146.53 and 856.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.45 : 2,146.53 = 856.83 : x
2. Step 2: Convert to fraction form
   1,555.45/2,146.53 = 856.83/x
3. Step 3: Cross multiply
   1,555.45x = 2,146.53 × 856.83
4. Step 4: Simplify right side
   1,555.45x = 1,839,203.26
5. Step 5: Solve for x
   x = 1,839,203.26/1,555.45
6. Step 6: Final answer
   x = 1,182.42