Finding the Fourth Proportional to 20,308.05, 30,462.21 and 13,293.96

Step by Step Solution

1. Step 1: Write the proportion equation
   20,308.05 : 30,462.21 = 13,293.96 : x
2. Step 2: Convert to fraction form
   20,308.05/30,462.21 = 13,293.96/x
3. Step 3: Cross multiply
   20,308.05x = 30,462.21 × 13,293.96
4. Step 4: Simplify right side
   20,308.05x = 404,963,401.25
5. Step 5: Solve for x
   x = 404,963,401.25/20,308.05
6. Step 6: Final answer
   x = 19,941.03