Finding the Fourth Proportional to 1,104.78, 1,524.56 and 607.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.78 : 1,524.56 = 607.42 : x
2. Step 2: Convert to fraction form
   1,104.78/1,524.56 = 607.42/x
3. Step 3: Cross multiply
   1,104.78x = 1,524.56 × 607.42
4. Step 4: Simplify right side
   1,104.78x = 926,048.24
5. Step 5: Solve for x
   x = 926,048.24/1,104.78
6. Step 6: Final answer
   x = 838.22