Finding the Fourth Proportional to 21,933.72, 32,900.55 and 7,142.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,933.72 : 32,900.55 = 7,142.62 : x
2. Step 2: Convert to fraction form
   21,933.72/32,900.55 = 7,142.62/x
3. Step 3: Cross multiply
   21,933.72x = 32,900.55 × 7,142.62
4. Step 4: Simplify right side
   21,933.72x = 234,996,017.40
5. Step 5: Solve for x
   x = 234,996,017.40/21,933.72
6. Step 6: Final answer
   x = 10,713.91