Finding the Fourth Proportional to 1,109.33, 1,531.04 and 667.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.33 : 1,531.04 = 667.25 : x
2. Step 2: Convert to fraction form
   1,109.33/1,531.04 = 667.25/x
3. Step 3: Cross multiply
   1,109.33x = 1,531.04 × 667.25
4. Step 4: Simplify right side
   1,109.33x = 1,021,575.45
5. Step 5: Solve for x
   x = 1,021,575.45/1,109.33
6. Step 6: Final answer
   x = 920.90