Finding the Fourth Proportional to 2,012.16, 3,019.20 and 901.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.16 : 3,019.20 = 901.92 : x
2. Step 2: Convert to fraction form
   2,012.16/3,019.20 = 901.92/x
3. Step 3: Cross multiply
   2,012.16x = 3,019.20 × 901.92
4. Step 4: Simplify right side
   2,012.16x = 2,723,076.86
5. Step 5: Solve for x
   x = 2,723,076.86/2,012.16
6. Step 6: Final answer
   x = 1,353.31