Finding the Fourth Proportional to 21,827.73, 30,125.89 and 12,877.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,827.73 : 30,125.89 = 12,877.43 : x
2. Step 2: Convert to fraction form
   21,827.73/30,125.89 = 12,877.43/x
3. Step 3: Cross multiply
   21,827.73x = 30,125.89 × 12,877.43
4. Step 4: Simplify right side
   21,827.73x = 387,944,131.07
5. Step 5: Solve for x
   x = 387,944,131.07/21,827.73
6. Step 6: Final answer
   x = 17,772.99