Finding the Fourth Proportional to 9,315.89, 12,852.77 and 5,282.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.89 : 12,852.77 = 5,282.28 : x
2. Step 2: Convert to fraction form
   9,315.89/12,852.77 = 5,282.28/x
3. Step 3: Cross multiply
   9,315.89x = 12,852.77 × 5,282.28
4. Step 4: Simplify right side
   9,315.89x = 67,891,903.50
5. Step 5: Solve for x
   x = 67,891,903.50/9,315.89
6. Step 6: Final answer
   x = 7,287.76