Finding the Fourth Proportional to 9,362.82, 12,921.50 and 5,171.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.82 : 12,921.50 = 5,171.88 : x
2. Step 2: Convert to fraction form
   9,362.82/12,921.50 = 5,171.88/x
3. Step 3: Cross multiply
   9,362.82x = 12,921.50 × 5,171.88
4. Step 4: Simplify right side
   9,362.82x = 66,828,421.56
5. Step 5: Solve for x
   x = 66,828,421.56/9,362.82
6. Step 6: Final answer
   x = 7,137.64