Finding the Fourth Proportional to 1,223.33, 1,688.06 and 692.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.33 : 1,688.06 = 692.24 : x
2. Step 2: Convert to fraction form
   1,223.33/1,688.06 = 692.24/x
3. Step 3: Cross multiply
   1,223.33x = 1,688.06 × 692.24
4. Step 4: Simplify right side
   1,223.33x = 1,168,535.94
5. Step 5: Solve for x
   x = 1,168,535.94/1,223.33
6. Step 6: Final answer
   x = 955.21