Finding the Fourth Proportional to 5,978.17, 8,964.21 and 3,168.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,978.17 : 8,964.21 = 3,168.55 : x
2. Step 2: Convert to fraction form
   5,978.17/8,964.21 = 3,168.55/x
3. Step 3: Cross multiply
   5,978.17x = 8,964.21 × 3,168.55
4. Step 4: Simplify right side
   5,978.17x = 28,403,547.60
5. Step 5: Solve for x
   x = 28,403,547.60/5,978.17
6. Step 6: Final answer
   x = 4,751.21