Finding the Fourth Proportional to 1,006.38, 1,388.61 and 608.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,006.38 : 1,388.61 = 608.27 : x
2. Step 2: Convert to fraction form
   1,006.38/1,388.61 = 608.27/x
3. Step 3: Cross multiply
   1,006.38x = 1,388.61 × 608.27
4. Step 4: Simplify right side
   1,006.38x = 844,642.86
5. Step 5: Solve for x
   x = 844,642.86/1,006.38
6. Step 6: Final answer
   x = 839.29