Finding the Fourth Proportional to 2,196.78, 3,297.60 and 1,224.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.78 : 3,297.60 = 1,224.78 : x
2. Step 2: Convert to fraction form
   2,196.78/3,297.60 = 1,224.78/x
3. Step 3: Cross multiply
   2,196.78x = 3,297.60 × 1,224.78
4. Step 4: Simplify right side
   2,196.78x = 4,038,834.53
5. Step 5: Solve for x
   x = 4,038,834.53/2,196.78
6. Step 6: Final answer
   x = 1,838.52