Finding the Fourth Proportional to 2,066.49, 3,099.78 and 767.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.49 : 3,099.78 = 767.97 : x
2. Step 2: Convert to fraction form
   2,066.49/3,099.78 = 767.97/x
3. Step 3: Cross multiply
   2,066.49x = 3,099.78 × 767.97
4. Step 4: Simplify right side
   2,066.49x = 2,380,538.05
5. Step 5: Solve for x
   x = 2,380,538.05/2,066.49
6. Step 6: Final answer
   x = 1,151.97