Finding the Fourth Proportional to 2,090.18, 3,134.91 and 856.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.18 : 3,134.91 = 856.82 : x
2. Step 2: Convert to fraction form
   2,090.18/3,134.91 = 856.82/x
3. Step 3: Cross multiply
   2,090.18x = 3,134.91 × 856.82
4. Step 4: Simplify right side
   2,090.18x = 2,686,053.59
5. Step 5: Solve for x
   x = 2,686,053.59/2,090.18
6. Step 6: Final answer
   x = 1,285.08