Finding the Fourth Proportional to 3,707.15, 5,115.89 and 2,028.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,707.15 : 5,115.89 = 2,028.58 : x
2. Step 2: Convert to fraction form
   3,707.15/5,115.89 = 2,028.58/x
3. Step 3: Cross multiply
   3,707.15x = 5,115.89 × 2,028.58
4. Step 4: Simplify right side
   3,707.15x = 10,377,984.42
5. Step 5: Solve for x
   x = 10,377,984.42/3,707.15
6. Step 6: Final answer
   x = 2,799.45