Finding the Fourth Proportional to 10,501.35, 15,751.86 and 3,105.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,501.35 : 15,751.86 = 3,105.78 : x
2. Step 2: Convert to fraction form
   10,501.35/15,751.86 = 3,105.78/x
3. Step 3: Cross multiply
   10,501.35x = 15,751.86 × 3,105.78
4. Step 4: Simplify right side
   10,501.35x = 48,921,811.75
5. Step 5: Solve for x
   x = 48,921,811.75/10,501.35
6. Step 6: Final answer
   x = 4,658.62