Finding the Fourth Proportional to 1,634.42, 2,449.46 and 855.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,634.42 : 2,449.46 = 855.09 : x
2. Step 2: Convert to fraction form
   1,634.42/2,449.46 = 855.09/x
3. Step 3: Cross multiply
   1,634.42x = 2,449.46 × 855.09
4. Step 4: Simplify right side
   1,634.42x = 2,094,510.89
5. Step 5: Solve for x
   x = 2,094,510.89/1,634.42
6. Step 6: Final answer
   x = 1,281.50