Finding the Fourth Proportional to 6,991.50, 9,648.27 and 3,847.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,991.50 : 9,648.27 = 3,847.76 : x
2. Step 2: Convert to fraction form
   6,991.50/9,648.27 = 3,847.76/x
3. Step 3: Cross multiply
   6,991.50x = 9,648.27 × 3,847.76
4. Step 4: Simplify right side
   6,991.50x = 37,124,179.13
5. Step 5: Solve for x
   x = 37,124,179.13/6,991.50
6. Step 6: Final answer
   x = 5,309.90