Finding the Fourth Proportional to 7,238.72, 10,857.88 and 3,076.64

Step by Step Solution

1. Step 1: Write the proportion equation
   7,238.72 : 10,857.88 = 3,076.64 : x
2. Step 2: Convert to fraction form
   7,238.72/10,857.88 = 3,076.64/x
3. Step 3: Cross multiply
   7,238.72x = 10,857.88 × 3,076.64
4. Step 4: Simplify right side
   7,238.72x = 33,405,772.54
5. Step 5: Solve for x
   x = 33,405,772.54/7,238.72
6. Step 6: Final answer
   x = 4,614.87