Finding the Fourth Proportional to 6,978.33, 9,631.86 and 3,995.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.33 : 9,631.86 = 3,995.10 : x
2. Step 2: Convert to fraction form
   6,978.33/9,631.86 = 3,995.10/x
3. Step 3: Cross multiply
   6,978.33x = 9,631.86 × 3,995.10
4. Step 4: Simplify right side
   6,978.33x = 38,480,243.89
5. Step 5: Solve for x
   x = 38,480,243.89/6,978.33
6. Step 6: Final answer
   x = 5,514.25