Finding the Fourth Proportional to 21,648.11, 32,446.04 and 10,538.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,648.11 : 32,446.04 = 10,538.15 : x
2. Step 2: Convert to fraction form
   21,648.11/32,446.04 = 10,538.15/x
3. Step 3: Cross multiply
   21,648.11x = 32,446.04 × 10,538.15
4. Step 4: Simplify right side
   21,648.11x = 341,921,021.51
5. Step 5: Solve for x
   x = 341,921,021.51/21,648.11
6. Step 6: Final answer
   x = 15,794.50