Finding the Fourth Proportional to 2,167.96, 3,250.71 and 1,290.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,167.96 : 3,250.71 = 1,290.73 : x
2. Step 2: Convert to fraction form
   2,167.96/3,250.71 = 1,290.73/x
3. Step 3: Cross multiply
   2,167.96x = 3,250.71 × 1,290.73
4. Step 4: Simplify right side
   2,167.96x = 4,195,788.92
5. Step 5: Solve for x
   x = 4,195,788.92/2,167.96
6. Step 6: Final answer
   x = 1,935.36