Finding the Fourth Proportional to 2,189.67, 3,284.86 and 873.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.67 : 3,284.86 = 873.42 : x
2. Step 2: Convert to fraction form
   2,189.67/3,284.86 = 873.42/x
3. Step 3: Cross multiply
   2,189.67x = 3,284.86 × 873.42
4. Step 4: Simplify right side
   2,189.67x = 2,869,062.42
5. Step 5: Solve for x
   x = 2,869,062.42/2,189.67
6. Step 6: Final answer
   x = 1,310.27