Finding the Fourth Proportional to 21,499.32, 29,668.07 and 11,939.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,499.32 : 29,668.07 = 11,939.83 : x
2. Step 2: Convert to fraction form
   21,499.32/29,668.07 = 11,939.83/x
3. Step 3: Cross multiply
   21,499.32x = 29,668.07 × 11,939.83
4. Step 4: Simplify right side
   21,499.32x = 354,231,667.91
5. Step 5: Solve for x
   x = 354,231,667.91/21,499.32
6. Step 6: Final answer
   x = 16,476.41