Finding the Fourth Proportional to 9,662.99, 13,312.17 and 9,081.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,662.99 : 13,312.17 = 9,081.73 : x
2. Step 2: Convert to fraction form
   9,662.99/13,312.17 = 9,081.73/x
3. Step 3: Cross multiply
   9,662.99x = 13,312.17 × 9,081.73
4. Step 4: Simplify right side
   9,662.99x = 120,897,500.37
5. Step 5: Solve for x
   x = 120,897,500.37/9,662.99
6. Step 6: Final answer
   x = 12,511.39