Finding the Fourth Proportional to 1,389.56, 1,915.06 and 968.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.56 : 1,915.06 = 968.52 : x
2. Step 2: Convert to fraction form
   1,389.56/1,915.06 = 968.52/x
3. Step 3: Cross multiply
   1,389.56x = 1,915.06 × 968.52
4. Step 4: Simplify right side
   1,389.56x = 1,854,773.91
5. Step 5: Solve for x
   x = 1,854,773.91/1,389.56
6. Step 6: Final answer
   x = 1,334.79