Finding the Fourth Proportional to 21,389.98, 32,090.43 and 8,238.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,389.98 : 32,090.43 = 8,238.82 : x
2. Step 2: Convert to fraction form
   21,389.98/32,090.43 = 8,238.82/x
3. Step 3: Cross multiply
   21,389.98x = 32,090.43 × 8,238.82
4. Step 4: Simplify right side
   21,389.98x = 264,387,116.04
5. Step 5: Solve for x
   x = 264,387,116.04/21,389.98
6. Step 6: Final answer
   x = 12,360.33