Finding the Fourth Proportional to 1,399.46, 1,931.36 and 926.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.46 : 1,931.36 = 926.54 : x
2. Step 2: Convert to fraction form
   1,399.46/1,931.36 = 926.54/x
3. Step 3: Cross multiply
   1,399.46x = 1,931.36 × 926.54
4. Step 4: Simplify right side
   1,399.46x = 1,789,468.00
5. Step 5: Solve for x
   x = 1,789,468.00/1,399.46
6. Step 6: Final answer
   x = 1,278.68