Finding the Fourth Proportional to 2,066.88, 3,099.71 and 768.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.88 : 3,099.71 = 768.05 : x
2. Step 2: Convert to fraction form
   2,066.88/3,099.71 = 768.05/x
3. Step 3: Cross multiply
   2,066.88x = 3,099.71 × 768.05
4. Step 4: Simplify right side
   2,066.88x = 2,380,712.93
5. Step 5: Solve for x
   x = 2,380,712.93/2,066.88
6. Step 6: Final answer
   x = 1,151.84