Finding the Fourth Proportional to 21,131.42, 29,161.50 and 11,700.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,131.42 : 29,161.50 = 11,700.14 : x
2. Step 2: Convert to fraction form
   21,131.42/29,161.50 = 11,700.14/x
3. Step 3: Cross multiply
   21,131.42x = 29,161.50 × 11,700.14
4. Step 4: Simplify right side
   21,131.42x = 341,193,632.61
5. Step 5: Solve for x
   x = 341,193,632.61/21,131.42
6. Step 6: Final answer
   x = 16,146.27