Finding the Fourth Proportional to 21,223.74, 31,839.72 and 8,075.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,223.74 : 31,839.72 = 8,075.10 : x
2. Step 2: Convert to fraction form
   21,223.74/31,839.72 = 8,075.10/x
3. Step 3: Cross multiply
   21,223.74x = 31,839.72 × 8,075.10
4. Step 4: Simplify right side
   21,223.74x = 257,108,922.97
5. Step 5: Solve for x
   x = 257,108,922.97/21,223.74
6. Step 6: Final answer
   x = 12,114.21