Finding the Fourth Proportional to 2,078.69, 3,118.56 and 617.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.69 : 3,118.56 = 617.81 : x
2. Step 2: Convert to fraction form
   2,078.69/3,118.56 = 617.81/x
3. Step 3: Cross multiply
   2,078.69x = 3,118.56 × 617.81
4. Step 4: Simplify right side
   2,078.69x = 1,926,661.96
5. Step 5: Solve for x
   x = 1,926,661.96/2,078.69
6. Step 6: Final answer
   x = 926.87