Finding the Fourth Proportional to 21,127.42, 31,674.73 and 8,650.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,127.42 : 31,674.73 = 8,650.59 : x
2. Step 2: Convert to fraction form
   21,127.42/31,674.73 = 8,650.59/x
3. Step 3: Cross multiply
   21,127.42x = 31,674.73 × 8,650.59
4. Step 4: Simplify right side
   21,127.42x = 274,005,102.59
5. Step 5: Solve for x
   x = 274,005,102.59/21,127.42
6. Step 6: Final answer
   x = 12,969.17