Finding the Fourth Proportional to 3,678.39, 5,076.41 and 2,106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,678.39 : 5,076.41 = 2,106.72 : x
2. Step 2: Convert to fraction form
   3,678.39/5,076.41 = 2,106.72/x
3. Step 3: Cross multiply
   3,678.39x = 5,076.41 × 2,106.72
4. Step 4: Simplify right side
   3,678.39x = 10,694,563.94
5. Step 5: Solve for x
   x = 10,694,563.94/3,678.39
6. Step 6: Final answer
   x = 2,907.40