Finding the Fourth Proportional to 6,578.91, 9,869.58 and 2,196.81

Step by Step Solution

1. Step 1: Write the proportion equation
   6,578.91 : 9,869.58 = 2,196.81 : x
2. Step 2: Convert to fraction form
   6,578.91/9,869.58 = 2,196.81/x
3. Step 3: Cross multiply
   6,578.91x = 9,869.58 × 2,196.81
4. Step 4: Simplify right side
   6,578.91x = 21,681,592.04
5. Step 5: Solve for x
   x = 21,681,592.04/6,578.91
6. Step 6: Final answer
   x = 3,295.62