Finding the Fourth Proportional to 8,485.72, 11,708.78 and 5,126.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485.72 : 11,708.78 = 5,126.29 : x
2. Step 2: Convert to fraction form
   8,485.72/11,708.78 = 5,126.29/x
3. Step 3: Cross multiply
   8,485.72x = 11,708.78 × 5,126.29
4. Step 4: Simplify right side
   8,485.72x = 60,022,546.92
5. Step 5: Solve for x
   x = 60,022,546.92/8,485.72
6. Step 6: Final answer
   x = 7,073.36