Finding the Fourth Proportional to 1,555.50, 2,146.59 and 856.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.50 : 2,146.59 = 856.92 : x
2. Step 2: Convert to fraction form
   1,555.50/2,146.59 = 856.92/x
3. Step 3: Cross multiply
   1,555.50x = 2,146.59 × 856.92
4. Step 4: Simplify right side
   1,555.50x = 1,839,455.90
5. Step 5: Solve for x
   x = 1,839,455.90/1,555.50
6. Step 6: Final answer
   x = 1,182.55