Finding the Fourth Proportional to 21,298.82, 31,947.11 and 8,150.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,298.82 : 31,947.11 = 8,150.18 : x
2. Step 2: Convert to fraction form
   21,298.82/31,947.11 = 8,150.18/x
3. Step 3: Cross multiply
   21,298.82x = 31,947.11 × 8,150.18
4. Step 4: Simplify right side
   21,298.82x = 260,374,696.98
5. Step 5: Solve for x
   x = 260,374,696.98/21,298.82
6. Step 6: Final answer
   x = 12,224.84