Finding the Fourth Proportional to 21,826.62, 30,119.34 and 12,874.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,826.62 : 30,119.34 = 12,874.50 : x
2. Step 2: Convert to fraction form
   21,826.62/30,119.34 = 12,874.50/x
3. Step 3: Cross multiply
   21,826.62x = 30,119.34 × 12,874.50
4. Step 4: Simplify right side
   21,826.62x = 387,771,442.83
5. Step 5: Solve for x
   x = 387,771,442.83/21,826.62
6. Step 6: Final answer
   x = 17,765.99