Finding the Fourth Proportional to 21,781.92, 30,059.76 and 12,350.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,781.92 : 30,059.76 = 12,350.88 : x
2. Step 2: Convert to fraction form
   21,781.92/30,059.76 = 12,350.88/x
3. Step 3: Cross multiply
   21,781.92x = 30,059.76 × 12,350.88
4. Step 4: Simplify right side
   21,781.92x = 371,264,488.59
5. Step 5: Solve for x
   x = 371,264,488.59/21,781.92
6. Step 6: Final answer
   x = 17,044.62