Finding the Fourth Proportional to 9,308.03, 12,839.87 and 5,720.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,308.03 : 12,839.87 = 5,720.48 : x
2. Step 2: Convert to fraction form
   9,308.03/12,839.87 = 5,720.48/x
3. Step 3: Cross multiply
   9,308.03x = 12,839.87 × 5,720.48
4. Step 4: Simplify right side
   9,308.03x = 73,450,223.03
5. Step 5: Solve for x
   x = 73,450,223.03/9,308.03
6. Step 6: Final answer
   x = 7,891.06