Finding the Fourth Proportional to 1,446.78, 2,167.56 and 667.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.78 : 2,167.56 = 667.44 : x
2. Step 2: Convert to fraction form
   1,446.78/2,167.56 = 667.44/x
3. Step 3: Cross multiply
   1,446.78x = 2,167.56 × 667.44
4. Step 4: Simplify right side
   1,446.78x = 1,446,716.25
5. Step 5: Solve for x
   x = 1,446,716.25/1,446.78
6. Step 6: Final answer
   x = 999.96