Finding the Fourth Proportional to 9,131.72, 13,617.40 and 9,048.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.72 : 13,617.40 = 9,048.56 : x
2. Step 2: Convert to fraction form
   9,131.72/13,617.40 = 9,048.56/x
3. Step 3: Cross multiply
   9,131.72x = 13,617.40 × 9,048.56
4. Step 4: Simplify right side
   9,131.72x = 123,217,860.94
5. Step 5: Solve for x
   x = 123,217,860.94/9,131.72
6. Step 6: Final answer
   x = 13,493.39