Finding the Fourth Proportional to 21,443.82, 29,596.68 and 12,947.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.82 : 29,596.68 = 12,947.34 : x
2. Step 2: Convert to fraction form
   21,443.82/29,596.68 = 12,947.34/x
3. Step 3: Cross multiply
   21,443.82x = 29,596.68 × 12,947.34
4. Step 4: Simplify right side
   21,443.82x = 383,198,278.83
5. Step 5: Solve for x
   x = 383,198,278.83/21,443.82
6. Step 6: Final answer
   x = 17,869.87