Finding the Fourth Proportional to 9,242.81, 12,759.78 and 5,708.07

Step by Step Solution

1. Step 1: Write the proportion equation
   9,242.81 : 12,759.78 = 5,708.07 : x
2. Step 2: Convert to fraction form
   9,242.81/12,759.78 = 5,708.07/x
3. Step 3: Cross multiply
   9,242.81x = 12,759.78 × 5,708.07
4. Step 4: Simplify right side
   9,242.81x = 72,833,706.72
5. Step 5: Solve for x
   x = 72,833,706.72/9,242.81
6. Step 6: Final answer
   x = 7,880.04