Finding the Fourth Proportional to 2,067.21, 3,100.86 and 768.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,067.21 : 3,100.86 = 768.42 : x
2. Step 2: Convert to fraction form
   2,067.21/3,100.86 = 768.42/x
3. Step 3: Cross multiply
   2,067.21x = 3,100.86 × 768.42
4. Step 4: Simplify right side
   2,067.21x = 2,382,762.84
5. Step 5: Solve for x
   x = 2,382,762.84/2,067.21
6. Step 6: Final answer
   x = 1,152.65