Finding the Fourth Proportional to 21,080.37, 31,622.38 and 8,601.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,080.37 : 31,622.38 = 8,601.25 : x
2. Step 2: Convert to fraction form
   21,080.37/31,622.38 = 8,601.25/x
3. Step 3: Cross multiply
   21,080.37x = 31,622.38 × 8,601.25
4. Step 4: Simplify right side
   21,080.37x = 271,991,995.98
5. Step 5: Solve for x
   x = 271,991,995.98/21,080.37
6. Step 6: Final answer
   x = 12,902.62