Finding the Fourth Proportional to 10,505.29, 15,757.88 and 3,109.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,505.29 : 15,757.88 = 3,109.79 : x
2. Step 2: Convert to fraction form
   10,505.29/15,757.88 = 3,109.79/x
3. Step 3: Cross multiply
   10,505.29x = 15,757.88 × 3,109.79
4. Step 4: Simplify right side
   10,505.29x = 49,003,697.65
5. Step 5: Solve for x
   x = 49,003,697.65/10,505.29
6. Step 6: Final answer
   x = 4,664.67