Finding the Fourth Proportional to 21,009.43, 31,523.71 and 7,862.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,009.43 : 31,523.71 = 7,862.82 : x
2. Step 2: Convert to fraction form
   21,009.43/31,523.71 = 7,862.82/x
3. Step 3: Cross multiply
   21,009.43x = 31,523.71 × 7,862.82
4. Step 4: Simplify right side
   21,009.43x = 247,865,237.81
5. Step 5: Solve for x
   x = 247,865,237.81/21,009.43
6. Step 6: Final answer
   x = 11,797.81