Finding the Fourth Proportional to 2,007.30, 3,011.85 and 911.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.30 : 3,011.85 = 911.10 : x
2. Step 2: Convert to fraction form
   2,007.30/3,011.85 = 911.10/x
3. Step 3: Cross multiply
   2,007.30x = 3,011.85 × 911.10
4. Step 4: Simplify right side
   2,007.30x = 2,744,096.54
5. Step 5: Solve for x
   x = 2,744,096.54/2,007.30
6. Step 6: Final answer
   x = 1,367.06