Finding the Fourth Proportional to 21,280.09, 31,922.52 and 7,241.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,280.09 : 31,922.52 = 7,241.59 : x
2. Step 2: Convert to fraction form
   21,280.09/31,922.52 = 7,241.59/x
3. Step 3: Cross multiply
   21,280.09x = 31,922.52 × 7,241.59
4. Step 4: Simplify right side
   21,280.09x = 231,169,801.61
5. Step 5: Solve for x
   x = 231,169,801.61/21,280.09
6. Step 6: Final answer
   x = 10,863.20