Finding the Fourth Proportional to 21,108.38, 31,678.06 and 10,015.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,108.38 : 31,678.06 = 10,015.02 : x
2. Step 2: Convert to fraction form
   21,108.38/31,678.06 = 10,015.02/x
3. Step 3: Cross multiply
   21,108.38x = 31,678.06 × 10,015.02
4. Step 4: Simplify right side
   21,108.38x = 317,256,404.46
5. Step 5: Solve for x
   x = 317,256,404.46/21,108.38
6. Step 6: Final answer
   x = 15,029.88