Finding the Fourth Proportional to 1,397.87, 1,928.79 and 950.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.87 : 1,928.79 = 950.09 : x
2. Step 2: Convert to fraction form
   1,397.87/1,928.79 = 950.09/x
3. Step 3: Cross multiply
   1,397.87x = 1,928.79 × 950.09
4. Step 4: Simplify right side
   1,397.87x = 1,832,524.09
5. Step 5: Solve for x
   x = 1,832,524.09/1,397.87
6. Step 6: Final answer
   x = 1,310.94