Finding the Fourth Proportional to 21,788.38, 30,073.42 and 12,832.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,788.38 : 30,073.42 = 12,832.62 : x
2. Step 2: Convert to fraction form
   21,788.38/30,073.42 = 12,832.62/x
3. Step 3: Cross multiply
   21,788.38x = 30,073.42 × 12,832.62
4. Step 4: Simplify right side
   21,788.38x = 385,920,770.96
5. Step 5: Solve for x
   x = 385,920,770.96/21,788.38
6. Step 6: Final answer
   x = 17,712.23