Finding the Fourth Proportional to 21,581.52, 29,782.46 and 12,150.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,581.52 : 29,782.46 = 12,150.12 : x
2. Step 2: Convert to fraction form
   21,581.52/29,782.46 = 12,150.12/x
3. Step 3: Cross multiply
   21,581.52x = 29,782.46 × 12,150.12
4. Step 4: Simplify right side
   21,581.52x = 361,860,462.90
5. Step 5: Solve for x
   x = 361,860,462.90/21,581.52
6. Step 6: Final answer
   x = 16,767.14