Finding the Fourth Proportional to 10,481.29, 15,720.72 and 3,906.75

Step by Step Solution

1. Step 1: Write the proportion equation
   10,481.29 : 15,720.72 = 3,906.75 : x
2. Step 2: Convert to fraction form
   10,481.29/15,720.72 = 3,906.75/x
3. Step 3: Cross multiply
   10,481.29x = 15,720.72 × 3,906.75
4. Step 4: Simplify right side
   10,481.29x = 61,416,922.86
5. Step 5: Solve for x
   x = 61,416,922.86/10,481.29
6. Step 6: Final answer
   x = 5,859.67