Finding the Fourth Proportional to 6,808.69, 9,395.98 and 3,978.01

Step by Step Solution

1. Step 1: Write the proportion equation
   6,808.69 : 9,395.98 = 3,978.01 : x
2. Step 2: Convert to fraction form
   6,808.69/9,395.98 = 3,978.01/x
3. Step 3: Cross multiply
   6,808.69x = 9,395.98 × 3,978.01
4. Step 4: Simplify right side
   6,808.69x = 37,377,302.40
5. Step 5: Solve for x
   x = 37,377,302.40/6,808.69
6. Step 6: Final answer
   x = 5,489.65