Finding the Fourth Proportional to 1,424.28, 1,965.24 and 900.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,424.28 : 1,965.24 = 900.48 : x
2. Step 2: Convert to fraction form
   1,424.28/1,965.24 = 900.48/x
3. Step 3: Cross multiply
   1,424.28x = 1,965.24 × 900.48
4. Step 4: Simplify right side
   1,424.28x = 1,769,659.32
5. Step 5: Solve for x
   x = 1,769,659.32/1,424.28
6. Step 6: Final answer
   x = 1,242.49