Finding the Fourth Proportional to 2,978.38, 4,468.54 and 2,144.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.38 : 4,468.54 = 2,144.76 : x
2. Step 2: Convert to fraction form
   2,978.38/4,468.54 = 2,144.76/x
3. Step 3: Cross multiply
   2,978.38x = 4,468.54 × 2,144.76
4. Step 4: Simplify right side
   2,978.38x = 9,583,935.54
5. Step 5: Solve for x
   x = 9,583,935.54/2,978.38
6. Step 6: Final answer
   x = 3,217.84