Finding the Fourth Proportional to 22,881, 31,578.76 and 12,813.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,881 : 31,578.76 = 12,813.28 : x
2. Step 2: Convert to fraction form
   22,881/31,578.76 = 12,813.28/x
3. Step 3: Cross multiply
   22,881x = 31,578.76 × 12,813.28
4. Step 4: Simplify right side
   22,881x = 404,627,493.93
5. Step 5: Solve for x
   x = 404,627,493.93/22,881
6. Step 6: Final answer
   x = 17,684.00