Finding the Fourth Proportional to 692.57, 956.72 and 667.31

Step by Step Solution

1. Step 1: Write the proportion equation
   692.57 : 956.72 = 667.31 : x
2. Step 2: Convert to fraction form
   692.57/956.72 = 667.31/x
3. Step 3: Cross multiply
   692.57x = 956.72 × 667.31
4. Step 4: Simplify right side
   692.57x = 638,428.82
5. Step 5: Solve for x
   x = 638,428.82/692.57
6. Step 6: Final answer
   x = 921.83