Finding the Fourth Proportional to 9,264.78, 12,778.83 and 5,729.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,264.78 : 12,778.83 = 5,729.67 : x
2. Step 2: Convert to fraction form
   9,264.78/12,778.83 = 5,729.67/x
3. Step 3: Cross multiply
   9,264.78x = 12,778.83 × 5,729.67
4. Step 4: Simplify right side
   9,264.78x = 73,218,478.89
5. Step 5: Solve for x
   x = 73,218,478.89/9,264.78
6. Step 6: Final answer
   x = 7,902.88