Finding the Fourth Proportional to 1,016.03, 1,402.22 and 638.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.03 : 1,402.22 = 638.19 : x
2. Step 2: Convert to fraction form
   1,016.03/1,402.22 = 638.19/x
3. Step 3: Cross multiply
   1,016.03x = 1,402.22 × 638.19
4. Step 4: Simplify right side
   1,016.03x = 894,882.78
5. Step 5: Solve for x
   x = 894,882.78/1,016.03
6. Step 6: Final answer
   x = 880.76