Finding the Fourth Proportional to 21,860.82, 30,167.19 and 12,300.90

Step by Step Solution

1. Step 1: Write the proportion equation
   21,860.82 : 30,167.19 = 12,300.90 : x
2. Step 2: Convert to fraction form
   21,860.82/30,167.19 = 12,300.90/x
3. Step 3: Cross multiply
   21,860.82x = 30,167.19 × 12,300.90
4. Step 4: Simplify right side
   21,860.82x = 371,083,587.47
5. Step 5: Solve for x
   x = 371,083,587.47/21,860.82
6. Step 6: Final answer
   x = 16,974.82