Finding the Fourth Proportional to 2,388.72, 3,287.88 and 2,197.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.72 : 3,287.88 = 2,197.56 : x
2. Step 2: Convert to fraction form
   2,388.72/3,287.88 = 2,197.56/x
3. Step 3: Cross multiply
   2,388.72x = 3,287.88 × 2,197.56
4. Step 4: Simplify right side
   2,388.72x = 7,225,313.57
5. Step 5: Solve for x
   x = 7,225,313.57/2,388.72
6. Step 6: Final answer
   x = 3,024.76