Finding the Fourth Proportional to 2,645.42, 3,643.18 and 2,199.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.42 : 3,643.18 = 2,199.24 : x
2. Step 2: Convert to fraction form
   2,645.42/3,643.18 = 2,199.24/x
3. Step 3: Cross multiply
   2,645.42x = 3,643.18 × 2,199.24
4. Step 4: Simplify right side
   2,645.42x = 8,012,221.69
5. Step 5: Solve for x
   x = 8,012,221.69/2,645.42
6. Step 6: Final answer
   x = 3,028.72