Finding the Fourth Proportional to 1,016.14, 1,401.55 and 661.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.14 : 1,401.55 = 661.41 : x
2. Step 2: Convert to fraction form
   1,016.14/1,401.55 = 661.41/x
3. Step 3: Cross multiply
   1,016.14x = 1,401.55 × 661.41
4. Step 4: Simplify right side
   1,016.14x = 926,997.53
5. Step 5: Solve for x
   x = 926,997.53/1,016.14
6. Step 6: Final answer
   x = 912.28