Finding the Fourth Proportional to 7,729.72, 10,664.22 and 5,078.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,729.72 : 10,664.22 = 5,078.56 : x
2. Step 2: Convert to fraction form
   7,729.72/10,664.22 = 5,078.56/x
3. Step 3: Cross multiply
   7,729.72x = 10,664.22 × 5,078.56
4. Step 4: Simplify right side
   7,729.72x = 54,158,881.12
5. Step 5: Solve for x
   x = 54,158,881.12/7,729.72
6. Step 6: Final answer
   x = 7,006.58