Finding the Fourth Proportional to 2,978.54, 4,115.49 and 2,873.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.54 : 4,115.49 = 2,873.42 : x
2. Step 2: Convert to fraction form
   2,978.54/4,115.49 = 2,873.42/x
3. Step 3: Cross multiply
   2,978.54x = 4,115.49 × 2,873.42
4. Step 4: Simplify right side
   2,978.54x = 11,825,531.28
5. Step 5: Solve for x
   x = 11,825,531.28/2,978.54
6. Step 6: Final answer
   x = 3,970.24