Finding the Fourth Proportional to 6,990.72, 9,647.19 and 3,846.89

Step by Step Solution

1. Step 1: Write the proportion equation
   6,990.72 : 9,647.19 = 3,846.89 : x
2. Step 2: Convert to fraction form
   6,990.72/9,647.19 = 3,846.89/x
3. Step 3: Cross multiply
   6,990.72x = 9,647.19 × 3,846.89
4. Step 4: Simplify right side
   6,990.72x = 37,111,630.50
5. Step 5: Solve for x
   x = 37,111,630.50/6,990.72
6. Step 6: Final answer
   x = 5,308.70