Finding the Fourth Proportional to 1,016.76, 1,403.32 and 624.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.76 : 1,403.32 = 624.04 : x
2. Step 2: Convert to fraction form
   1,016.76/1,403.32 = 624.04/x
3. Step 3: Cross multiply
   1,016.76x = 1,403.32 × 624.04
4. Step 4: Simplify right side
   1,016.76x = 875,727.81
5. Step 5: Solve for x
   x = 875,727.81/1,016.76
6. Step 6: Final answer
   x = 861.29