Finding the Fourth Proportional to 9,206.69, 12,703.82 and 5,172.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,206.69 : 12,703.82 = 5,172.72 : x
2. Step 2: Convert to fraction form
   9,206.69/12,703.82 = 5,172.72/x
3. Step 3: Cross multiply
   9,206.69x = 12,703.82 × 5,172.72
4. Step 4: Simplify right side
   9,206.69x = 65,713,277.93
5. Step 5: Solve for x
   x = 65,713,277.93/9,206.69
6. Step 6: Final answer
   x = 7,137.56