Finding the Fourth Proportional to 21,131.05, 31,654.20 and 10,048.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,131.05 : 31,654.20 = 10,048.42 : x
2. Step 2: Convert to fraction form
   21,131.05/31,654.20 = 10,048.42/x
3. Step 3: Cross multiply
   21,131.05x = 31,654.20 × 10,048.42
4. Step 4: Simplify right side
   21,131.05x = 318,074,696.36
5. Step 5: Solve for x
   x = 318,074,696.36/21,131.05
6. Step 6: Final answer
   x = 15,052.48