Finding the Fourth Proportional to 2,010.78, 3,016.70 and 624.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,010.78 : 3,016.70 = 624.15 : x
2. Step 2: Convert to fraction form
   2,010.78/3,016.70 = 624.15/x
3. Step 3: Cross multiply
   2,010.78x = 3,016.70 × 624.15
4. Step 4: Simplify right side
   2,010.78x = 1,882,873.31
5. Step 5: Solve for x
   x = 1,882,873.31/2,010.78
6. Step 6: Final answer
   x = 936.39