Finding the Fourth Proportional to 21,950.84, 30,292.30 and 12,874.35

Step by Step Solution

1. Step 1: Write the proportion equation
   21,950.84 : 30,292.30 = 12,874.35 : x
2. Step 2: Convert to fraction form
   21,950.84/30,292.30 = 12,874.35/x
3. Step 3: Cross multiply
   21,950.84x = 30,292.30 × 12,874.35
4. Step 4: Simplify right side
   21,950.84x = 389,993,672.51
5. Step 5: Solve for x
   x = 389,993,672.51/21,950.84
6. Step 6: Final answer
   x = 17,766.69