Finding the Fourth Proportional to 1,109.75, 1,531.23 and 667.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.75 : 1,531.23 = 667.49 : x
2. Step 2: Convert to fraction form
   1,109.75/1,531.23 = 667.49/x
3. Step 3: Cross multiply
   1,109.75x = 1,531.23 × 667.49
4. Step 4: Simplify right side
   1,109.75x = 1,022,073.06
5. Step 5: Solve for x
   x = 1,022,073.06/1,109.75
6. Step 6: Final answer
   x = 921.00