Finding the Fourth Proportional to 6,892.78, 9,513.01 and 3,909.35

Step by Step Solution

1. Step 1: Write the proportion equation
   6,892.78 : 9,513.01 = 3,909.35 : x
2. Step 2: Convert to fraction form
   6,892.78/9,513.01 = 3,909.35/x
3. Step 3: Cross multiply
   6,892.78x = 9,513.01 × 3,909.35
4. Step 4: Simplify right side
   6,892.78x = 37,189,685.64
5. Step 5: Solve for x
   x = 37,189,685.64/6,892.78
6. Step 6: Final answer
   x = 5,395.46