Finding the Fourth Proportional to 2,955.89, 4,433.91 and 764.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,955.89 : 4,433.91 = 764.61 : x
2. Step 2: Convert to fraction form
   2,955.89/4,433.91 = 764.61/x
3. Step 3: Cross multiply
   2,955.89x = 4,433.91 × 764.61
4. Step 4: Simplify right side
   2,955.89x = 3,390,211.93
5. Step 5: Solve for x
   x = 3,390,211.93/2,955.89
6. Step 6: Final answer
   x = 1,146.94