Finding the Fourth Proportional to 9,525.11, 13,223.83 and 9,239.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,525.11 : 13,223.83 = 9,239.99 : x
2. Step 2: Convert to fraction form
   9,525.11/13,223.83 = 9,239.99/x
3. Step 3: Cross multiply
   9,525.11x = 13,223.83 × 9,239.99
4. Step 4: Simplify right side
   9,525.11x = 122,188,056.96
5. Step 5: Solve for x
   x = 122,188,056.96/9,525.11
6. Step 6: Final answer
   x = 12,827.99