Finding the Fourth Proportional to 2,003.12, 3,002.24 and 907.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.12 : 3,002.24 = 907.20 : x
2. Step 2: Convert to fraction form
   2,003.12/3,002.24 = 907.20/x
3. Step 3: Cross multiply
   2,003.12x = 3,002.24 × 907.20
4. Step 4: Simplify right side
   2,003.12x = 2,723,632.13
5. Step 5: Solve for x
   x = 2,723,632.13/2,003.12
6. Step 6: Final answer
   x = 1,359.69