Finding the Fourth Proportional to 9,243.36, 12,756.72 and 5,708.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,243.36 : 12,756.72 = 5,708.64 : x
2. Step 2: Convert to fraction form
   9,243.36/12,756.72 = 5,708.64/x
3. Step 3: Cross multiply
   9,243.36x = 12,756.72 × 5,708.64
4. Step 4: Simplify right side
   9,243.36x = 72,823,522.06
5. Step 5: Solve for x
   x = 72,823,522.06/9,243.36
6. Step 6: Final answer
   x = 7,878.47