Finding the Fourth Proportional to 9,362.69, 12,921.32 and 5,171.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.69 : 12,921.32 = 5,171.75 : x
2. Step 2: Convert to fraction form
   9,362.69/12,921.32 = 5,171.75/x
3. Step 3: Cross multiply
   9,362.69x = 12,921.32 × 5,171.75
4. Step 4: Simplify right side
   9,362.69x = 66,825,836.71
5. Step 5: Solve for x
   x = 66,825,836.71/9,362.69
6. Step 6: Final answer
   x = 7,137.46