Finding the Fourth Proportional to 21,415, 32,101.17 and 10,318.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,415 : 32,101.17 = 10,318.54 : x
2. Step 2: Convert to fraction form
   21,415/32,101.17 = 10,318.54/x
3. Step 3: Cross multiply
   21,415x = 32,101.17 × 10,318.54
4. Step 4: Simplify right side
   21,415x = 331,237,206.69
5. Step 5: Solve for x
   x = 331,237,206.69/21,415
6. Step 6: Final answer
   x = 15,467.53