Finding the Fourth Proportional to 2,091.46, 3,136.74 and 858.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.46 : 3,136.74 = 858.82 : x
2. Step 2: Convert to fraction form
   2,091.46/3,136.74 = 858.82/x
3. Step 3: Cross multiply
   2,091.46x = 3,136.74 × 858.82
4. Step 4: Simplify right side
   2,091.46x = 2,693,895.05
5. Step 5: Solve for x
   x = 2,693,895.05/2,091.46
6. Step 6: Final answer
   x = 1,288.05