Finding the Fourth Proportional to 13,404.12, 20,105.94 and 4,638.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.12 : 20,105.94 = 4,638.91 : x
2. Step 2: Convert to fraction form
   13,404.12/20,105.94 = 4,638.91/x
3. Step 3: Cross multiply
   13,404.12x = 20,105.94 × 4,638.91
4. Step 4: Simplify right side
   13,404.12x = 93,269,545.60
5. Step 5: Solve for x
   x = 93,269,545.60/13,404.12
6. Step 6: Final answer
   x = 6,958.27