Finding the Fourth Proportional to 21,158.82, 31,734.11 and 8,012.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,158.82 : 31,734.11 = 8,012.25 : x
2. Step 2: Convert to fraction form
   21,158.82/31,734.11 = 8,012.25/x
3. Step 3: Cross multiply
   21,158.82x = 31,734.11 × 8,012.25
4. Step 4: Simplify right side
   21,158.82x = 254,261,642.88
5. Step 5: Solve for x
   x = 254,261,642.88/21,158.82
6. Step 6: Final answer
   x = 12,016.82