Finding the Fourth Proportional to 2,227.10, 3,340.71 and 765.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.10 : 3,340.71 = 765.72 : x
2. Step 2: Convert to fraction form
   2,227.10/3,340.71 = 765.72/x
3. Step 3: Cross multiply
   2,227.10x = 3,340.71 × 765.72
4. Step 4: Simplify right side
   2,227.10x = 2,558,048.46
5. Step 5: Solve for x
   x = 2,558,048.46/2,227.10
6. Step 6: Final answer
   x = 1,148.60