Finding the Fourth Proportional to 2,614.79, 3,921.77 and 765.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,614.79 : 3,921.77 = 765.47 : x
2. Step 2: Convert to fraction form
   2,614.79/3,921.77 = 765.47/x
3. Step 3: Cross multiply
   2,614.79x = 3,921.77 × 765.47
4. Step 4: Simplify right side
   2,614.79x = 3,001,973.85
5. Step 5: Solve for x
   x = 3,001,973.85/2,614.79
6. Step 6: Final answer
   x = 1,148.08