Finding the Fourth Proportional to 1,731.28, 2,389.06 and 945.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,731.28 : 2,389.06 = 945.31 : x
2. Step 2: Convert to fraction form
   1,731.28/2,389.06 = 945.31/x
3. Step 3: Cross multiply
   1,731.28x = 2,389.06 × 945.31
4. Step 4: Simplify right side
   1,731.28x = 2,258,402.31
5. Step 5: Solve for x
   x = 2,258,402.31/1,731.28
6. Step 6: Final answer
   x = 1,304.47