Finding the Fourth Proportional to 1,224.18, 1,689.41 and 693.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224.18 : 1,689.41 = 693.27 : x
2. Step 2: Convert to fraction form
   1,224.18/1,689.41 = 693.27/x
3. Step 3: Cross multiply
   1,224.18x = 1,689.41 × 693.27
4. Step 4: Simplify right side
   1,224.18x = 1,171,217.27
5. Step 5: Solve for x
   x = 1,171,217.27/1,224.18
6. Step 6: Final answer
   x = 956.74