Finding the Fourth Proportional to 2,387.20, 3,582.72 and 2,199.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.20 : 3,582.72 = 2,199.04 : x
2. Step 2: Convert to fraction form
   2,387.20/3,582.72 = 2,199.04/x
3. Step 3: Cross multiply
   2,387.20x = 3,582.72 × 2,199.04
4. Step 4: Simplify right side
   2,387.20x = 7,878,544.59
5. Step 5: Solve for x
   x = 7,878,544.59/2,387.20
6. Step 6: Final answer
   x = 3,300.33