Finding the Fourth Proportional to 1,109.38, 1,529.85 and 667.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.38 : 1,529.85 = 667.23 : x
2. Step 2: Convert to fraction form
   1,109.38/1,529.85 = 667.23/x
3. Step 3: Cross multiply
   1,109.38x = 1,529.85 × 667.23
4. Step 4: Simplify right side
   1,109.38x = 1,020,761.82
5. Step 5: Solve for x
   x = 1,020,761.82/1,109.38
6. Step 6: Final answer
   x = 920.12