Finding the Fourth Proportional to 1,107.69, 1,528.61 and 610.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.69 : 1,528.61 = 610.33 : x
2. Step 2: Convert to fraction form
   1,107.69/1,528.61 = 610.33/x
3. Step 3: Cross multiply
   1,107.69x = 1,528.61 × 610.33
4. Step 4: Simplify right side
   1,107.69x = 932,956.16
5. Step 5: Solve for x
   x = 932,956.16/1,107.69
6. Step 6: Final answer
   x = 842.25