Finding the Fourth Proportional to 1,397.73, 1,928.82 and 900.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.73 : 1,928.82 = 900.87 : x
2. Step 2: Convert to fraction form
   1,397.73/1,928.82 = 900.87/x
3. Step 3: Cross multiply
   1,397.73x = 1,928.82 × 900.87
4. Step 4: Simplify right side
   1,397.73x = 1,737,616.07
5. Step 5: Solve for x
   x = 1,737,616.07/1,397.73
6. Step 6: Final answer
   x = 1,243.17