Finding the Fourth Proportional to 2,436.78, 3,653.64 and 974.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.78 : 3,653.64 = 974.28 : x
2. Step 2: Convert to fraction form
   2,436.78/3,653.64 = 974.28/x
3. Step 3: Cross multiply
   2,436.78x = 3,653.64 × 974.28
4. Step 4: Simplify right side
   2,436.78x = 3,559,668.38
5. Step 5: Solve for x
   x = 3,559,668.38/2,436.78
6. Step 6: Final answer
   x = 1,460.81