Finding the Fourth Proportional to 21,311.69, 31,945.24 and 7,266.80

Step by Step Solution

1. Step 1: Write the proportion equation
   21,311.69 : 31,945.24 = 7,266.80 : x
2. Step 2: Convert to fraction form
   21,311.69/31,945.24 = 7,266.80/x
3. Step 3: Cross multiply
   21,311.69x = 31,945.24 × 7,266.80
4. Step 4: Simplify right side
   21,311.69x = 232,139,510.31
5. Step 5: Solve for x
   x = 232,139,510.31/21,311.69
6. Step 6: Final answer
   x = 10,892.59