Finding the Fourth Proportional to 3,406.38, 5,109.54 and 2,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,406.38 : 5,109.54 = 2,018.72 : x
2. Step 2: Convert to fraction form
   3,406.38/5,109.54 = 2,018.72/x
3. Step 3: Cross multiply
   3,406.38x = 5,109.54 × 2,018.72
4. Step 4: Simplify right side
   3,406.38x = 10,314,712.77
5. Step 5: Solve for x
   x = 10,314,712.77/3,406.38
6. Step 6: Final answer
   x = 3,028.05