Finding the Fourth Proportional to 8,647.98, 12,976.20 and 5,360.19

Step by Step Solution

1. Step 1: Write the proportion equation
   8,647.98 : 12,976.20 = 5,360.19 : x
2. Step 2: Convert to fraction form
   8,647.98/12,976.20 = 5,360.19/x
3. Step 3: Cross multiply
   8,647.98x = 12,976.20 × 5,360.19
4. Step 4: Simplify right side
   8,647.98x = 69,554,897.48
5. Step 5: Solve for x
   x = 69,554,897.48/8,647.98
6. Step 6: Final answer
   x = 8,042.91