Finding the Fourth Proportional to 3,820.28, 5,678.92 and 3,708.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.28 : 5,678.92 = 3,708.18 : x
2. Step 2: Convert to fraction form
   3,820.28/5,678.92 = 3,708.18/x
3. Step 3: Cross multiply
   3,820.28x = 5,678.92 × 3,708.18
4. Step 4: Simplify right side
   3,820.28x = 21,058,457.57
5. Step 5: Solve for x
   x = 21,058,457.57/3,820.28
6. Step 6: Final answer
   x = 5,512.28