Finding the Fourth Proportional to 8,608.18, 12,879.69 and 5,100.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,608.18 : 12,879.69 = 5,100.07 : x
2. Step 2: Convert to fraction form
   8,608.18/12,879.69 = 5,100.07/x
3. Step 3: Cross multiply
   8,608.18x = 12,879.69 × 5,100.07
4. Step 4: Simplify right side
   8,608.18x = 65,687,320.58
5. Step 5: Solve for x
   x = 65,687,320.58/8,608.18
6. Step 6: Final answer
   x = 7,630.80