Finding the Fourth Proportional to 9,313.72, 12,852.86 and 5,064.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,313.72 : 12,852.86 = 5,064.78 : x
2. Step 2: Convert to fraction form
   9,313.72/12,852.86 = 5,064.78/x
3. Step 3: Cross multiply
   9,313.72x = 12,852.86 × 5,064.78
4. Step 4: Simplify right side
   9,313.72x = 65,096,908.27
5. Step 5: Solve for x
   x = 65,096,908.27/9,313.72
6. Step 6: Final answer
   x = 6,989.36