Finding the Fourth Proportional to 1,224.47, 1,689.54 and 693.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,224.47 : 1,689.54 = 693.25 : x
2. Step 2: Convert to fraction form
   1,224.47/1,689.54 = 693.25/x
3. Step 3: Cross multiply
   1,224.47x = 1,689.54 × 693.25
4. Step 4: Simplify right side
   1,224.47x = 1,171,273.61
5. Step 5: Solve for x
   x = 1,171,273.61/1,224.47
6. Step 6: Final answer
   x = 956.56