Finding the Fourth Proportional to 21,562.96, 29,756.58 and 12,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,562.96 : 29,756.58 = 12,131.50 : x
2. Step 2: Convert to fraction form
   21,562.96/29,756.58 = 12,131.50/x
3. Step 3: Cross multiply
   21,562.96x = 29,756.58 × 12,131.50
4. Step 4: Simplify right side
   21,562.96x = 360,991,950.27
5. Step 5: Solve for x
   x = 360,991,950.27/21,562.96
6. Step 6: Final answer
   x = 16,741.30