Finding the Fourth Proportional to 21,151.56, 29,191.14 and 12,200.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,151.56 : 29,191.14 = 12,200.52 : x
2. Step 2: Convert to fraction form
   21,151.56/29,191.14 = 12,200.52/x
3. Step 3: Cross multiply
   21,151.56x = 29,191.14 × 12,200.52
4. Step 4: Simplify right side
   21,151.56x = 356,147,087.39
5. Step 5: Solve for x
   x = 356,147,087.39/21,151.56
6. Step 6: Final answer
   x = 16,837.86