Finding the Fourth Proportional to 13,356.72, 20,031.48 and 5,031.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,356.72 : 20,031.48 = 5,031.42 : x
2. Step 2: Convert to fraction form
   13,356.72/20,031.48 = 5,031.42/x
3. Step 3: Cross multiply
   13,356.72x = 20,031.48 × 5,031.42
4. Step 4: Simplify right side
   13,356.72x = 100,786,789.10
5. Step 5: Solve for x
   x = 100,786,789.10/13,356.72
6. Step 6: Final answer
   x = 7,545.77