Finding the Fourth Proportional to 21,574.21, 29,769.82 and 12,011.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,574.21 : 29,769.82 = 12,011.71 : x
2. Step 2: Convert to fraction form
   21,574.21/29,769.82 = 12,011.71/x
3. Step 3: Cross multiply
   21,574.21x = 29,769.82 × 12,011.71
4. Step 4: Simplify right side
   21,574.21x = 357,586,444.59
5. Step 5: Solve for x
   x = 357,586,444.59/21,574.21
6. Step 6: Final answer
   x = 16,574.72