Finding the Fourth Proportional to 9,150.72, 13,731.72 and 3,603.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.72 : 13,731.72 = 3,603.12 : x
2. Step 2: Convert to fraction form
   9,150.72/13,731.72 = 3,603.12/x
3. Step 3: Cross multiply
   9,150.72x = 13,731.72 × 3,603.12
4. Step 4: Simplify right side
   9,150.72x = 49,477,034.97
5. Step 5: Solve for x
   x = 49,477,034.97/9,150.72
6. Step 6: Final answer
   x = 5,406.90