Finding the Fourth Proportional to 2,007.76, 3,011.71 and 620.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.76 : 3,011.71 = 620.97 : x
2. Step 2: Convert to fraction form
   2,007.76/3,011.71 = 620.97/x
3. Step 3: Cross multiply
   2,007.76x = 3,011.71 × 620.97
4. Step 4: Simplify right side
   2,007.76x = 1,870,166.50
5. Step 5: Solve for x
   x = 1,870,166.50/2,007.76
6. Step 6: Final answer
   x = 931.47