Finding the Fourth Proportional to 21,086.81, 29,096.83 and 12,012.41

Step by Step Solution

1. Step 1: Write the proportion equation
   21,086.81 : 29,096.83 = 12,012.41 : x
2. Step 2: Convert to fraction form
   21,086.81/29,096.83 = 12,012.41/x
3. Step 3: Cross multiply
   21,086.81x = 29,096.83 × 12,012.41
4. Step 4: Simplify right side
   21,086.81x = 349,522,991.60
5. Step 5: Solve for x
   x = 349,522,991.60/21,086.81
6. Step 6: Final answer
   x = 16,575.43