Finding the Fourth Proportional to 21,443.64, 29,593.56 and 12,012.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.64 : 29,593.56 = 12,012.76 : x
2. Step 2: Convert to fraction form
   21,443.64/29,593.56 = 12,012.76/x
3. Step 3: Cross multiply
   21,443.64x = 29,593.56 × 12,012.76
4. Step 4: Simplify right side
   21,443.64x = 355,500,333.83
5. Step 5: Solve for x
   x = 355,500,333.83/21,443.64
6. Step 6: Final answer
   x = 16,578.36