Finding the Fourth Proportional to 7,847.33, 10,828.82 and 7,220.39

Step by Step Solution

1. Step 1: Write the proportion equation
   7,847.33 : 10,828.82 = 7,220.39 : x
2. Step 2: Convert to fraction form
   7,847.33/10,828.82 = 7,220.39/x
3. Step 3: Cross multiply
   7,847.33x = 10,828.82 × 7,220.39
4. Step 4: Simplify right side
   7,847.33x = 78,188,213.39
5. Step 5: Solve for x
   x = 78,188,213.39/7,847.33
6. Step 6: Final answer
   x = 9,963.68