Finding the Fourth Proportional to 21,498.58, 29,667.04 and 11,939.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,498.58 : 29,667.04 = 11,939.07 : x
2. Step 2: Convert to fraction form
   21,498.58/29,667.04 = 11,939.07/x
3. Step 3: Cross multiply
   21,498.58x = 29,667.04 × 11,939.07
4. Step 4: Simplify right side
   21,498.58x = 354,196,807.56
5. Step 5: Solve for x
   x = 354,196,807.56/21,498.58
6. Step 6: Final answer
   x = 16,475.36