Finding the Fourth Proportional to 8,404.16, 12,608.06 and 5,288.29

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.16 : 12,608.06 = 5,288.29 : x
2. Step 2: Convert to fraction form
   8,404.16/12,608.06 = 5,288.29/x
3. Step 3: Cross multiply
   8,404.16x = 12,608.06 × 5,288.29
4. Step 4: Simplify right side
   8,404.16x = 66,675,019.66
5. Step 5: Solve for x
   x = 66,675,019.66/8,404.16
6. Step 6: Final answer
   x = 7,933.58