Finding the Fourth Proportional to 1,109.24, 1,531.20 and 667.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.24 : 1,531.20 = 667.52 : x
2. Step 2: Convert to fraction form
   1,109.24/1,531.20 = 667.52/x
3. Step 3: Cross multiply
   1,109.24x = 1,531.20 × 667.52
4. Step 4: Simplify right side
   1,109.24x = 1,022,106.62
5. Step 5: Solve for x
   x = 1,022,106.62/1,109.24
6. Step 6: Final answer
   x = 921.45