Finding the Fourth Proportional to 6,990.96, 9,647.98 and 3,847.08

Step by Step Solution

1. Step 1: Write the proportion equation
   6,990.96 : 9,647.98 = 3,847.08 : x
2. Step 2: Convert to fraction form
   6,990.96/9,647.98 = 3,847.08/x
3. Step 3: Cross multiply
   6,990.96x = 9,647.98 × 3,847.08
4. Step 4: Simplify right side
   6,990.96x = 37,116,550.90
5. Step 5: Solve for x
   x = 37,116,550.90/6,990.96
6. Step 6: Final answer
   x = 5,309.22