Finding the Fourth Proportional to 6,990.69, 9,647.15 and 3,846.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,990.69 : 9,647.15 = 3,846.88 : x
2. Step 2: Convert to fraction form
   6,990.69/9,647.15 = 3,846.88/x
3. Step 3: Cross multiply
   6,990.69x = 9,647.15 × 3,846.88
4. Step 4: Simplify right side
   6,990.69x = 37,111,380.16
5. Step 5: Solve for x
   x = 37,111,380.16/6,990.69
6. Step 6: Final answer
   x = 5,308.69