Finding the Fourth Proportional to 5,865.12, 8,092.68 and 3,978.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,865.12 : 8,092.68 = 3,978.18 : x
2. Step 2: Convert to fraction form
   5,865.12/8,092.68 = 3,978.18/x
3. Step 3: Cross multiply
   5,865.12x = 8,092.68 × 3,978.18
4. Step 4: Simplify right side
   5,865.12x = 32,194,137.72
5. Step 5: Solve for x
   x = 32,194,137.72/5,865.12
6. Step 6: Final answer
   x = 5,489.08