Finding the Fourth Proportional to 2,178.52, 3,258.86 and 1,813.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178.52 : 3,258.86 = 1,813.80 : x
2. Step 2: Convert to fraction form
   2,178.52/3,258.86 = 1,813.80/x
3. Step 3: Cross multiply
   2,178.52x = 3,258.86 × 1,813.80
4. Step 4: Simplify right side
   2,178.52x = 5,910,920.27
5. Step 5: Solve for x
   x = 5,910,920.27/2,178.52
6. Step 6: Final answer
   x = 2,713.27