Finding the Fourth Proportional to 2,978.37, 4,112.16 and 2,662.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.37 : 4,112.16 = 2,662.62 : x
2. Step 2: Convert to fraction form
   2,978.37/4,112.16 = 2,662.62/x
3. Step 3: Cross multiply
   2,978.37x = 4,112.16 × 2,662.62
4. Step 4: Simplify right side
   2,978.37x = 10,949,119.46
5. Step 5: Solve for x
   x = 10,949,119.46/2,978.37
6. Step 6: Final answer
   x = 3,676.21