Finding the Fourth Proportional to 2,078.52, 3,117.71 and 845.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.52 : 3,117.71 = 845.60 : x
2. Step 2: Convert to fraction form
   2,078.52/3,117.71 = 845.60/x
3. Step 3: Cross multiply
   2,078.52x = 3,117.71 × 845.60
4. Step 4: Simplify right side
   2,078.52x = 2,636,315.76
5. Step 5: Solve for x
   x = 2,636,315.76/2,078.52
6. Step 6: Final answer
   x = 1,268.36