Finding the Fourth Proportional to 1,397.82, 1,928.36 and 900.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.82 : 1,928.36 = 900.28 : x
2. Step 2: Convert to fraction form
   1,397.82/1,928.36 = 900.28/x
3. Step 3: Cross multiply
   1,397.82x = 1,928.36 × 900.28
4. Step 4: Simplify right side
   1,397.82x = 1,736,063.94
5. Step 5: Solve for x
   x = 1,736,063.94/1,397.82
6. Step 6: Final answer
   x = 1,241.98