Finding the Fourth Proportional to 9,133.28, 13,704.80 and 3,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,133.28 : 13,704.80 = 3,938.72 : x
2. Step 2: Convert to fraction form
   9,133.28/13,704.80 = 3,938.72/x
3. Step 3: Cross multiply
   9,133.28x = 13,704.80 × 3,938.72
4. Step 4: Simplify right side
   9,133.28x = 53,979,369.86
5. Step 5: Solve for x
   x = 53,979,369.86/9,133.28
6. Step 6: Final answer
   x = 5,910.18