Finding the Fourth Proportional to 21,562.48, 29,756.10 and 12,131.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,562.48 : 29,756.10 = 12,131.12 : x
2. Step 2: Convert to fraction form
   21,562.48/29,756.10 = 12,131.12/x
3. Step 3: Cross multiply
   21,562.48x = 29,756.10 × 12,131.12
4. Step 4: Simplify right side
   21,562.48x = 360,974,819.83
5. Step 5: Solve for x
   x = 360,974,819.83/21,562.48
6. Step 6: Final answer
   x = 16,740.88