Finding the Fourth Proportional to 3,196.80, 4,789.12 and 1,877.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,196.80 : 4,789.12 = 1,877.31 : x
2. Step 2: Convert to fraction form
   3,196.80/4,789.12 = 1,877.31/x
3. Step 3: Cross multiply
   3,196.80x = 4,789.12 × 1,877.31
4. Step 4: Simplify right side
   3,196.80x = 8,990,662.87
5. Step 5: Solve for x
   x = 8,990,662.87/3,196.80
6. Step 6: Final answer
   x = 2,812.39