Finding the Fourth Proportional to 2,431.62, 3,647.28 and 969.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.62 : 3,647.28 = 969.72 : x
2. Step 2: Convert to fraction form
   2,431.62/3,647.28 = 969.72/x
3. Step 3: Cross multiply
   2,431.62x = 3,647.28 × 969.72
4. Step 4: Simplify right side
   2,431.62x = 3,536,845.38
5. Step 5: Solve for x
   x = 3,536,845.38/2,431.62
6. Step 6: Final answer
   x = 1,454.52