Finding the Fourth Proportional to 2,338.76, 3,227.21 and 1,290.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.76 : 3,227.21 = 1,290.76 : x
2. Step 2: Convert to fraction form
   2,338.76/3,227.21 = 1,290.76/x
3. Step 3: Cross multiply
   2,338.76x = 3,227.21 × 1,290.76
4. Step 4: Simplify right side
   2,338.76x = 4,165,543.90
5. Step 5: Solve for x
   x = 4,165,543.90/2,338.76
6. Step 6: Final answer
   x = 1,781.09