Finding the Fourth Proportional to 2,170.67, 3,256.94 and 854.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,170.67 : 3,256.94 = 854.82 : x
2. Step 2: Convert to fraction form
   2,170.67/3,256.94 = 854.82/x
3. Step 3: Cross multiply
   2,170.67x = 3,256.94 × 854.82
4. Step 4: Simplify right side
   2,170.67x = 2,784,099.59
5. Step 5: Solve for x
   x = 2,784,099.59/2,170.67
6. Step 6: Final answer
   x = 1,282.60