Finding the Fourth Proportional to 22,689.67, 31,311.81 and 12,618.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,689.67 : 31,311.81 = 12,618.76 : x
2. Step 2: Convert to fraction form
   22,689.67/31,311.81 = 12,618.76/x
3. Step 3: Cross multiply
   22,689.67x = 31,311.81 × 12,618.76
4. Step 4: Simplify right side
   22,689.67x = 395,116,215.56
5. Step 5: Solve for x
   x = 395,116,215.56/22,689.67
6. Step 6: Final answer
   x = 17,413.93