Finding the Fourth Proportional to 6,867.78, 9,468.37 and 5,456.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,867.78 : 9,468.37 = 5,456.15 : x
2. Step 2: Convert to fraction form
   6,867.78/9,468.37 = 5,456.15/x
3. Step 3: Cross multiply
   6,867.78x = 9,468.37 × 5,456.15
4. Step 4: Simplify right side
   6,867.78x = 51,660,846.98
5. Step 5: Solve for x
   x = 51,660,846.98/6,867.78
6. Step 6: Final answer
   x = 7,522.20