Finding the Fourth Proportional to 7,038.72, 9,713.52 and 3,895.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,038.72 : 9,713.52 = 3,895.20 : x
2. Step 2: Convert to fraction form
   7,038.72/9,713.52 = 3,895.20/x
3. Step 3: Cross multiply
   7,038.72x = 9,713.52 × 3,895.20
4. Step 4: Simplify right side
   7,038.72x = 37,836,103.10
5. Step 5: Solve for x
   x = 37,836,103.10/7,038.72
6. Step 6: Final answer
   x = 5,375.42