Finding the Fourth Proportional to 2,007.71, 3,010.49 and 620.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.71 : 3,010.49 = 620.45 : x
2. Step 2: Convert to fraction form
   2,007.71/3,010.49 = 620.45/x
3. Step 3: Cross multiply
   2,007.71x = 3,010.49 × 620.45
4. Step 4: Simplify right side
   2,007.71x = 1,867,865.27
5. Step 5: Solve for x
   x = 1,867,865.27/2,007.71
6. Step 6: Final answer
   x = 930.34