Finding the Fourth Proportional to 2,007.67, 3,011.60 and 912.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.67 : 3,011.60 = 912.15 : x
2. Step 2: Convert to fraction form
   2,007.67/3,011.60 = 912.15/x
3. Step 3: Cross multiply
   2,007.67x = 3,011.60 × 912.15
4. Step 4: Simplify right side
   2,007.67x = 2,747,030.94
5. Step 5: Solve for x
   x = 2,747,030.94/2,007.67
6. Step 6: Final answer
   x = 1,368.27