Finding the Fourth Proportional to 2,196.28, 3,286.72 and 1,801.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.28 : 3,286.72 = 1,801.40 : x
2. Step 2: Convert to fraction form
   2,196.28/3,286.72 = 1,801.40/x
3. Step 3: Cross multiply
   2,196.28x = 3,286.72 × 1,801.40
4. Step 4: Simplify right side
   2,196.28x = 5,920,701.12
5. Step 5: Solve for x
   x = 5,920,701.12/2,196.28
6. Step 6: Final answer
   x = 2,695.79