Finding the Fourth Proportional to 2,338.46, 3,227.05 and 1,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.46 : 3,227.05 = 1,290.50 : x
2. Step 2: Convert to fraction form
   2,338.46/3,227.05 = 1,290.50/x
3. Step 3: Cross multiply
   2,338.46x = 3,227.05 × 1,290.50
4. Step 4: Simplify right side
   2,338.46x = 4,164,508.03
5. Step 5: Solve for x
   x = 4,164,508.03/2,338.46
6. Step 6: Final answer
   x = 1,780.88