Finding the Fourth Proportional to 1,016.15, 1,401.71 and 622.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.15 : 1,401.71 = 622.89 : x
2. Step 2: Convert to fraction form
   1,016.15/1,401.71 = 622.89/x
3. Step 3: Cross multiply
   1,016.15x = 1,401.71 × 622.89
4. Step 4: Simplify right side
   1,016.15x = 873,108.03
5. Step 5: Solve for x
   x = 873,108.03/1,016.15
6. Step 6: Final answer
   x = 859.24