Finding the Fourth Proportional to 21,096.37, 29,115.89 and 12,711.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,096.37 : 29,115.89 = 12,711.25 : x
2. Step 2: Convert to fraction form
   21,096.37/29,115.89 = 12,711.25/x
3. Step 3: Cross multiply
   21,096.37x = 29,115.89 × 12,711.25
4. Step 4: Simplify right side
   21,096.37x = 370,099,356.76
5. Step 5: Solve for x
   x = 370,099,356.76/21,096.37
6. Step 6: Final answer
   x = 17,543.27