Finding the Fourth Proportional to 2,078.69, 3,117.71 and 846.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.69 : 3,117.71 = 846.07 : x
2. Step 2: Convert to fraction form
   2,078.69/3,117.71 = 846.07/x
3. Step 3: Cross multiply
   2,078.69x = 3,117.71 × 846.07
4. Step 4: Simplify right side
   2,078.69x = 2,637,795.22
5. Step 5: Solve for x
   x = 2,637,795.22/2,078.69
6. Step 6: Final answer
   x = 1,268.97