Finding the Fourth Proportional to 2,955.72, 4,433.40 and 764.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,955.72 : 4,433.40 = 764.56 : x
2. Step 2: Convert to fraction form
   2,955.72/4,433.40 = 764.56/x
3. Step 3: Cross multiply
   2,955.72x = 4,433.40 × 764.56
4. Step 4: Simplify right side
   2,955.72x = 3,389,600.30
5. Step 5: Solve for x
   x = 3,389,600.30/2,955.72
6. Step 6: Final answer
   x = 1,146.79