Finding the Fourth Proportional to 21,745.83, 30,008.74 and 12,793.91

Step by Step Solution

1. Step 1: Write the proportion equation
   21,745.83 : 30,008.74 = 12,793.91 : x
2. Step 2: Convert to fraction form
   21,745.83/30,008.74 = 12,793.91/x
3. Step 3: Cross multiply
   21,745.83x = 30,008.74 × 12,793.91
4. Step 4: Simplify right side
   21,745.83x = 383,929,124.30
5. Step 5: Solve for x
   x = 383,929,124.30/21,745.83
6. Step 6: Final answer
   x = 17,655.30