Finding the Fourth Proportional to 1,397.43, 1,928.05 and 900.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.43 : 1,928.05 = 900.24 : x
2. Step 2: Convert to fraction form
   1,397.43/1,928.05 = 900.24/x
3. Step 3: Cross multiply
   1,397.43x = 1,928.05 × 900.24
4. Step 4: Simplify right side
   1,397.43x = 1,735,708.74
5. Step 5: Solve for x
   x = 1,735,708.74/1,397.43
6. Step 6: Final answer
   x = 1,242.07