Finding the Fourth Proportional to 22,817.50, 31,488.18 and 12,881.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,817.50 : 31,488.18 = 12,881.50 : x
2. Step 2: Convert to fraction form
   22,817.50/31,488.18 = 12,881.50/x
3. Step 3: Cross multiply
   22,817.50x = 31,488.18 × 12,881.50
4. Step 4: Simplify right side
   22,817.50x = 405,614,990.67
5. Step 5: Solve for x
   x = 405,614,990.67/22,817.50
6. Step 6: Final answer
   x = 17,776.49