Finding the Fourth Proportional to 9,363.34, 12,921.33 and 5,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,363.34 : 12,921.33 = 5,171.50 : x
2. Step 2: Convert to fraction form
   9,363.34/12,921.33 = 5,171.50/x
3. Step 3: Cross multiply
   9,363.34x = 12,921.33 × 5,171.50
4. Step 4: Simplify right side
   9,363.34x = 66,822,658.10
5. Step 5: Solve for x
   x = 66,822,658.10/9,363.34
6. Step 6: Final answer
   x = 7,136.63