Finding the Fourth Proportional to 21,938.49, 32,911.15 and 7,143.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,938.49 : 32,911.15 = 7,143.96 : x
2. Step 2: Convert to fraction form
   21,938.49/32,911.15 = 7,143.96/x
3. Step 3: Cross multiply
   21,938.49x = 32,911.15 × 7,143.96
4. Step 4: Simplify right side
   21,938.49x = 235,116,044.71
5. Step 5: Solve for x
   x = 235,116,044.71/21,938.49
6. Step 6: Final answer
   x = 10,717.06