Finding the Fourth Proportional to 2,131.80, 3,196.89 and 1,020.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.80 : 3,196.89 = 1,020.08 : x
2. Step 2: Convert to fraction form
   2,131.80/3,196.89 = 1,020.08/x
3. Step 3: Cross multiply
   2,131.80x = 3,196.89 × 1,020.08
4. Step 4: Simplify right side
   2,131.80x = 3,261,067.57
5. Step 5: Solve for x
   x = 3,261,067.57/2,131.80
6. Step 6: Final answer
   x = 1,529.72