Finding the Fourth Proportional to 1,109.08, 1,529.82 and 667.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.08 : 1,529.82 = 667.12 : x
2. Step 2: Convert to fraction form
   1,109.08/1,529.82 = 667.12/x
3. Step 3: Cross multiply
   1,109.08x = 1,529.82 × 667.12
4. Step 4: Simplify right side
   1,109.08x = 1,020,573.52
5. Step 5: Solve for x
   x = 1,020,573.52/1,109.08
6. Step 6: Final answer
   x = 920.20