Finding the Fourth Proportional to 21,439.68, 32,142.34 and 10,189.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,439.68 : 32,142.34 = 10,189.37 : x
2. Step 2: Convert to fraction form
   21,439.68/32,142.34 = 10,189.37/x
3. Step 3: Cross multiply
   21,439.68x = 32,142.34 × 10,189.37
4. Step 4: Simplify right side
   21,439.68x = 327,510,107.22
5. Step 5: Solve for x
   x = 327,510,107.22/21,439.68
6. Step 6: Final answer
   x = 15,275.89