Finding the Fourth Proportional to 21,443.42, 29,591.93 and 12,012.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.42 : 29,591.93 = 12,012.05 : x
2. Step 2: Convert to fraction form
   21,443.42/29,591.93 = 12,012.05/x
3. Step 3: Cross multiply
   21,443.42x = 29,591.93 × 12,012.05
4. Step 4: Simplify right side
   21,443.42x = 355,459,742.76
5. Step 5: Solve for x
   x = 355,459,742.76/21,443.42
6. Step 6: Final answer
   x = 16,576.63