Finding the Fourth Proportional to 6,978.26, 9,622.32 and 5,915.54

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.26 : 9,622.32 = 5,915.54 : x
2. Step 2: Convert to fraction form
   6,978.26/9,622.32 = 5,915.54/x
3. Step 3: Cross multiply
   6,978.26x = 9,622.32 × 5,915.54
4. Step 4: Simplify right side
   6,978.26x = 56,921,218.85
5. Step 5: Solve for x
   x = 56,921,218.85/6,978.26
6. Step 6: Final answer
   x = 8,156.94