Finding the Fourth Proportional to 1,016.06, 1,401.45 and 623.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.06 : 1,401.45 = 623.24 : x
2. Step 2: Convert to fraction form
   1,016.06/1,401.45 = 623.24/x
3. Step 3: Cross multiply
   1,016.06x = 1,401.45 × 623.24
4. Step 4: Simplify right side
   1,016.06x = 873,439.70
5. Step 5: Solve for x
   x = 873,439.70/1,016.06
6. Step 6: Final answer
   x = 859.63