Finding the Fourth Proportional to 21,443.30, 29,591.75 and 12,011.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.30 : 29,591.75 = 12,011.86 : x
2. Step 2: Convert to fraction form
   21,443.30/29,591.75 = 12,011.86/x
3. Step 3: Cross multiply
   21,443.30x = 29,591.75 × 12,011.86
4. Step 4: Simplify right side
   21,443.30x = 355,451,914.21
5. Step 5: Solve for x
   x = 355,451,914.21/21,443.30
6. Step 6: Final answer
   x = 16,576.37