Finding the Fourth Proportional to 2,151.56, 3,226.74 and 764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.56 : 3,226.74 = 764.72 : x
2. Step 2: Convert to fraction form
   2,151.56/3,226.74 = 764.72/x
3. Step 3: Cross multiply
   2,151.56x = 3,226.74 × 764.72
4. Step 4: Simplify right side
   2,151.56x = 2,467,552.61
5. Step 5: Solve for x
   x = 2,467,552.61/2,151.56
6. Step 6: Final answer
   x = 1,146.87