Finding the Fourth Proportional to 21,725.06, 29,980.59 and 11,789.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,725.06 : 29,980.59 = 11,789.06 : x
2. Step 2: Convert to fraction form
   21,725.06/29,980.59 = 11,789.06/x
3. Step 3: Cross multiply
   21,725.06x = 29,980.59 × 11,789.06
4. Step 4: Simplify right side
   21,725.06x = 353,443,005.09
5. Step 5: Solve for x
   x = 353,443,005.09/21,725.06
6. Step 6: Final answer
   x = 16,268.91