Finding the Fourth Proportional to 1,389.27, 1,915.04 and 946.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.27 : 1,915.04 = 946.41 : x
2. Step 2: Convert to fraction form
   1,389.27/1,915.04 = 946.41/x
3. Step 3: Cross multiply
   1,389.27x = 1,915.04 × 946.41
4. Step 4: Simplify right side
   1,389.27x = 1,812,408.27
5. Step 5: Solve for x
   x = 1,812,408.27/1,389.27
6. Step 6: Final answer
   x = 1,304.58