Finding the Fourth Proportional to 21,933.48, 32,900.18 and 7,142.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,933.48 : 32,900.18 = 7,142.38 : x
2. Step 2: Convert to fraction form
   21,933.48/32,900.18 = 7,142.38/x
3. Step 3: Cross multiply
   21,933.48x = 32,900.18 × 7,142.38
4. Step 4: Simplify right side
   21,933.48x = 234,985,469.67
5. Step 5: Solve for x
   x = 234,985,469.67/21,933.48
6. Step 6: Final answer
   x = 10,713.55