Finding the Fourth Proportional to 1,109.67, 1,530.22 and 667.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.67 : 1,530.22 = 667.49 : x
2. Step 2: Convert to fraction form
   1,109.67/1,530.22 = 667.49/x
3. Step 3: Cross multiply
   1,109.67x = 1,530.22 × 667.49
4. Step 4: Simplify right side
   1,109.67x = 1,021,405.21
5. Step 5: Solve for x
   x = 1,021,405.21/1,109.67
6. Step 6: Final answer
   x = 920.45