Finding the Fourth Proportional to 2,007.57, 3,010.23 and 620.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.57 : 3,010.23 = 620.51 : x
2. Step 2: Convert to fraction form
   2,007.57/3,010.23 = 620.51/x
3. Step 3: Cross multiply
   2,007.57x = 3,010.23 × 620.51
4. Step 4: Simplify right side
   2,007.57x = 1,867,877.82
5. Step 5: Solve for x
   x = 1,867,877.82/2,007.57
6. Step 6: Final answer
   x = 930.42