Finding the Fourth Proportional to 1,109.25, 1,530.72 and 611.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.25 : 1,530.72 = 611.92 : x
2. Step 2: Convert to fraction form
   1,109.25/1,530.72 = 611.92/x
3. Step 3: Cross multiply
   1,109.25x = 1,530.72 × 611.92
4. Step 4: Simplify right side
   1,109.25x = 936,678.18
5. Step 5: Solve for x
   x = 936,678.18/1,109.25
6. Step 6: Final answer
   x = 844.42