Finding the Fourth Proportional to 6,808.15, 10,213.59 and 3,109.38

Step by Step Solution

1. Step 1: Write the proportion equation
   6,808.15 : 10,213.59 = 3,109.38 : x
2. Step 2: Convert to fraction form
   6,808.15/10,213.59 = 3,109.38/x
3. Step 3: Cross multiply
   6,808.15x = 10,213.59 × 3,109.38
4. Step 4: Simplify right side
   6,808.15x = 31,757,970.78
5. Step 5: Solve for x
   x = 31,757,970.78/6,808.15
6. Step 6: Final answer
   x = 4,664.70