Finding the Fourth Proportional to 1,856.96, 2,785.42 and 559.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.96 : 2,785.42 = 559.34 : x
2. Step 2: Convert to fraction form
   1,856.96/2,785.42 = 559.34/x
3. Step 3: Cross multiply
   1,856.96x = 2,785.42 × 559.34
4. Step 4: Simplify right side
   1,856.96x = 1,557,996.82
5. Step 5: Solve for x
   x = 1,557,996.82/1,856.96
6. Step 6: Final answer
   x = 839.00