Finding the Fourth Proportional to 21,791.12, 30,061.74 and 12,834.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,791.12 : 30,061.74 = 12,834.33 : x
2. Step 2: Convert to fraction form
   21,791.12/30,061.74 = 12,834.33/x
3. Step 3: Cross multiply
   21,791.12x = 30,061.74 × 12,834.33
4. Step 4: Simplify right side
   21,791.12x = 385,822,291.53
5. Step 5: Solve for x
   x = 385,822,291.53/21,791.12
6. Step 6: Final answer
   x = 17,705.49