Finding the Fourth Proportional to 2,105.69, 3,157.80 and 624.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.69 : 3,157.80 = 624.50 : x
2. Step 2: Convert to fraction form
   2,105.69/3,157.80 = 624.50/x
3. Step 3: Cross multiply
   2,105.69x = 3,157.80 × 624.50
4. Step 4: Simplify right side
   2,105.69x = 1,972,046.10
5. Step 5: Solve for x
   x = 1,972,046.10/2,105.69
6. Step 6: Final answer
   x = 936.53