Finding the Fourth Proportional to 6,918.86, 9,545.94 and 4,086.48

Step by Step Solution

1. Step 1: Write the proportion equation
   6,918.86 : 9,545.94 = 4,086.48 : x
2. Step 2: Convert to fraction form
   6,918.86/9,545.94 = 4,086.48/x
3. Step 3: Cross multiply
   6,918.86x = 9,545.94 × 4,086.48
4. Step 4: Simplify right side
   6,918.86x = 39,009,292.89
5. Step 5: Solve for x
   x = 39,009,292.89/6,918.86
6. Step 6: Final answer
   x = 5,638.11