Finding the Fourth Proportional to 2,338.55, 3,227.11 and 1,290.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.55 : 3,227.11 = 1,290.59 : x
2. Step 2: Convert to fraction form
   2,338.55/3,227.11 = 1,290.59/x
3. Step 3: Cross multiply
   2,338.55x = 3,227.11 × 1,290.59
4. Step 4: Simplify right side
   2,338.55x = 4,164,856.53
5. Step 5: Solve for x
   x = 4,164,856.53/2,338.55
6. Step 6: Final answer
   x = 1,780.96