Finding the Fourth Proportional to 22,809.40, 31,476.20 and 12,737.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,809.40 : 31,476.20 = 12,737.76 : x
2. Step 2: Convert to fraction form
   22,809.40/31,476.20 = 12,737.76/x
3. Step 3: Cross multiply
   22,809.40x = 31,476.20 × 12,737.76
4. Step 4: Simplify right side
   22,809.40x = 400,936,099.59
5. Step 5: Solve for x
   x = 400,936,099.59/22,809.40
6. Step 6: Final answer
   x = 17,577.67