Finding the Fourth Proportional to 21,233.58, 31,863.17 and 7,392.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,233.58 : 31,863.17 = 7,392.30 : x
2. Step 2: Convert to fraction form
   21,233.58/31,863.17 = 7,392.30/x
3. Step 3: Cross multiply
   21,233.58x = 31,863.17 × 7,392.30
4. Step 4: Simplify right side
   21,233.58x = 235,542,111.59
5. Step 5: Solve for x
   x = 235,542,111.59/21,233.58
6. Step 6: Final answer
   x = 11,092.91