Finding the Fourth Proportional to 9,522.34, 13,140.33 and 5,215.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,522.34 : 13,140.33 = 5,215.31 : x
2. Step 2: Convert to fraction form
   9,522.34/13,140.33 = 5,215.31/x
3. Step 3: Cross multiply
   9,522.34x = 13,140.33 × 5,215.31
4. Step 4: Simplify right side
   9,522.34x = 68,530,894.45
5. Step 5: Solve for x
   x = 68,530,894.45/9,522.34
6. Step 6: Final answer
   x = 7,196.85