Finding the Fourth Proportional to 21,781.96, 30,076.05 and 16,738.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,781.96 : 30,076.05 = 16,738.18 : x
2. Step 2: Convert to fraction form
   21,781.96/30,076.05 = 16,738.18/x
3. Step 3: Cross multiply
   21,781.96x = 30,076.05 × 16,738.18
4. Step 4: Simplify right side
   21,781.96x = 503,418,338.59
5. Step 5: Solve for x
   x = 503,418,338.59/21,781.96
6. Step 6: Final answer
   x = 23,111.71