Finding the Fourth Proportional to 21,942.34, 32,916.27 and 7,147.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,942.34 : 32,916.27 = 7,147.30 : x
2. Step 2: Convert to fraction form
   21,942.34/32,916.27 = 7,147.30/x
3. Step 3: Cross multiply
   21,942.34x = 32,916.27 × 7,147.30
4. Step 4: Simplify right side
   21,942.34x = 235,262,456.57
5. Step 5: Solve for x
   x = 235,262,456.57/21,942.34
6. Step 6: Final answer
   x = 10,721.85