Finding the Fourth Proportional to 1,107.56, 1,528.39 and 610.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.56 : 1,528.39 = 610.15 : x
2. Step 2: Convert to fraction form
   1,107.56/1,528.39 = 610.15/x
3. Step 3: Cross multiply
   1,107.56x = 1,528.39 × 610.15
4. Step 4: Simplify right side
   1,107.56x = 932,547.16
5. Step 5: Solve for x
   x = 932,547.16/1,107.56
6. Step 6: Final answer
   x = 841.98