Finding the Fourth Proportional to 978.68, 1,460.90 and 959.24

Step by Step Solution

1. Step 1: Write the proportion equation
   978.68 : 1,460.90 = 959.24 : x
2. Step 2: Convert to fraction form
   978.68/1,460.90 = 959.24/x
3. Step 3: Cross multiply
   978.68x = 1,460.90 × 959.24
4. Step 4: Simplify right side
   978.68x = 1,401,353.72
5. Step 5: Solve for x
   x = 1,401,353.72/978.68
6. Step 6: Final answer
   x = 1,431.88