Finding the Fourth Proportional to 2,066.90, 3,100.50 and 768.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.90 : 3,100.50 = 768.38 : x
2. Step 2: Convert to fraction form
   2,066.90/3,100.50 = 768.38/x
3. Step 3: Cross multiply
   2,066.90x = 3,100.50 × 768.38
4. Step 4: Simplify right side
   2,066.90x = 2,382,346.69
5. Step 5: Solve for x
   x = 2,382,346.69/2,066.90
6. Step 6: Final answer
   x = 1,152.62