Finding the Fourth Proportional to 1,109.32, 1,530.78 and 611.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.32 : 1,530.78 = 611.96 : x
2. Step 2: Convert to fraction form
   1,109.32/1,530.78 = 611.96/x
3. Step 3: Cross multiply
   1,109.32x = 1,530.78 × 611.96
4. Step 4: Simplify right side
   1,109.32x = 936,776.13
5. Step 5: Solve for x
   x = 936,776.13/1,109.32
6. Step 6: Final answer
   x = 844.46