Finding the Fourth Proportional to 1,997.12, 2,993.24 and 901.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,997.12 : 2,993.24 = 901.20 : x
2. Step 2: Convert to fraction form
   1,997.12/2,993.24 = 901.20/x
3. Step 3: Cross multiply
   1,997.12x = 2,993.24 × 901.20
4. Step 4: Simplify right side
   1,997.12x = 2,697,507.89
5. Step 5: Solve for x
   x = 2,697,507.89/1,997.12
6. Step 6: Final answer
   x = 1,350.70