Finding the Fourth Proportional to 6,945.50, 10,405.16 and 3,431.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,945.50 : 10,405.16 = 3,431.39 : x
2. Step 2: Convert to fraction form
   6,945.50/10,405.16 = 3,431.39/x
3. Step 3: Cross multiply
   6,945.50x = 10,405.16 × 3,431.39
4. Step 4: Simplify right side
   6,945.50x = 35,704,134.92
5. Step 5: Solve for x
   x = 35,704,134.92/6,945.50
6. Step 6: Final answer
   x = 5,140.62