Finding the Fourth Proportional to 2,191.69, 3,287.39 and 893.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.69 : 3,287.39 = 893.12 : x
2. Step 2: Convert to fraction form
   2,191.69/3,287.39 = 893.12/x
3. Step 3: Cross multiply
   2,191.69x = 3,287.39 × 893.12
4. Step 4: Simplify right side
   2,191.69x = 2,936,033.76
5. Step 5: Solve for x
   x = 2,936,033.76/2,191.69
6. Step 6: Final answer
   x = 1,339.62