Finding the Fourth Proportional to 1,398.54, 1,928.01 and 957.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.54 : 1,928.01 = 957.49 : x
2. Step 2: Convert to fraction form
   1,398.54/1,928.01 = 957.49/x
3. Step 3: Cross multiply
   1,398.54x = 1,928.01 × 957.49
4. Step 4: Simplify right side
   1,398.54x = 1,846,050.29
5. Step 5: Solve for x
   x = 1,846,050.29/1,398.54
6. Step 6: Final answer
   x = 1,319.98