Finding the Fourth Proportional to 1,109.03, 1,530.43 and 611.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.03 : 1,530.43 = 611.65 : x
2. Step 2: Convert to fraction form
   1,109.03/1,530.43 = 611.65/x
3. Step 3: Cross multiply
   1,109.03x = 1,530.43 × 611.65
4. Step 4: Simplify right side
   1,109.03x = 936,087.89
5. Step 5: Solve for x
   x = 936,087.89/1,109.03
6. Step 6: Final answer
   x = 844.06