Finding the Fourth Proportional to 3,758.16, 5,186.37 and 2,079.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,758.16 : 5,186.37 = 2,079.78 : x
2. Step 2: Convert to fraction form
   3,758.16/5,186.37 = 2,079.78/x
3. Step 3: Cross multiply
   3,758.16x = 5,186.37 × 2,079.78
4. Step 4: Simplify right side
   3,758.16x = 10,786,508.60
5. Step 5: Solve for x
   x = 10,786,508.60/3,758.16
6. Step 6: Final answer
   x = 2,870.16