Finding the Fourth Proportional to 1,621.49, 2,433.58 and 953.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.49 : 2,433.58 = 953.78 : x
2. Step 2: Convert to fraction form
   1,621.49/2,433.58 = 953.78/x
3. Step 3: Cross multiply
   1,621.49x = 2,433.58 × 953.78
4. Step 4: Simplify right side
   1,621.49x = 2,321,085.38
5. Step 5: Solve for x
   x = 2,321,085.38/1,621.49
6. Step 6: Final answer
   x = 1,431.46