Finding the Fourth Proportional to 2,151.59, 3,227.87 and 764.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.59 : 3,227.87 = 764.92 : x
2. Step 2: Convert to fraction form
   2,151.59/3,227.87 = 764.92/x
3. Step 3: Cross multiply
   2,151.59x = 3,227.87 × 764.92
4. Step 4: Simplify right side
   2,151.59x = 2,469,062.32
5. Step 5: Solve for x
   x = 2,469,062.32/2,151.59
6. Step 6: Final answer
   x = 1,147.55