Finding the Fourth Proportional to 2,936.59, 4,405.56 and 856.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,936.59 : 4,405.56 = 856.54 : x
2. Step 2: Convert to fraction form
   2,936.59/4,405.56 = 856.54/x
3. Step 3: Cross multiply
   2,936.59x = 4,405.56 × 856.54
4. Step 4: Simplify right side
   2,936.59x = 3,773,540.66
5. Step 5: Solve for x
   x = 3,773,540.66/2,936.59
6. Step 6: Final answer
   x = 1,285.01