Finding the Fourth Proportional to 20,105.01, 27,735.82 and 12,553.21

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.01 : 27,735.82 = 12,553.21 : x
2. Step 2: Convert to fraction form
   20,105.01/27,735.82 = 12,553.21/x
3. Step 3: Cross multiply
   20,105.01x = 27,735.82 × 12,553.21
4. Step 4: Simplify right side
   20,105.01x = 348,173,576.27
5. Step 5: Solve for x
   x = 348,173,576.27/20,105.01
6. Step 6: Final answer
   x = 17,317.75