Finding the Fourth Proportional to 21,868.32, 32,783.79 and 10,018.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,868.32 : 32,783.79 = 10,018.12 : x
2. Step 2: Convert to fraction form
   21,868.32/32,783.79 = 10,018.12/x
3. Step 3: Cross multiply
   21,868.32x = 32,783.79 × 10,018.12
4. Step 4: Simplify right side
   21,868.32x = 328,431,942.27
5. Step 5: Solve for x
   x = 328,431,942.27/21,868.32
6. Step 6: Final answer
   x = 15,018.62