Finding the Fourth Proportional to 9,609.90, 13,262.31 and 5,361.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,609.90 : 13,262.31 = 5,361.72 : x
2. Step 2: Convert to fraction form
   9,609.90/13,262.31 = 5,361.72/x
3. Step 3: Cross multiply
   9,609.90x = 13,262.31 × 5,361.72
4. Step 4: Simplify right side
   9,609.90x = 71,108,792.77
5. Step 5: Solve for x
   x = 71,108,792.77/9,609.90
6. Step 6: Final answer
   x = 7,399.54