Finding the Fourth Proportional to 2,196.80, 2,919.44 and 2,196.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.80 : 2,919.44 = 2,196.80 : x
2. Step 2: Convert to fraction form
   2,196.80/2,919.44 = 2,196.80/x
3. Step 3: Cross multiply
   2,196.80x = 2,919.44 × 2,196.80
4. Step 4: Simplify right side
   2,196.80x = 6,413,425.79
5. Step 5: Solve for x
   x = 6,413,425.79/2,196.80
6. Step 6: Final answer
   x = 2,919.44