Finding the Fourth Proportional to 1,222.04, 1,685.50 and 773.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.04 : 1,685.50 = 773.24 : x
2. Step 2: Convert to fraction form
   1,222.04/1,685.50 = 773.24/x
3. Step 3: Cross multiply
   1,222.04x = 1,685.50 × 773.24
4. Step 4: Simplify right side
   1,222.04x = 1,303,296.02
5. Step 5: Solve for x
   x = 1,303,296.02/1,222.04
6. Step 6: Final answer
   x = 1,066.49