Finding the Fourth Proportional to 2,339.05, 3,227.89 and 1,291.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.05 : 3,227.89 = 1,291.12 : x
2. Step 2: Convert to fraction form
   2,339.05/3,227.89 = 1,291.12/x
3. Step 3: Cross multiply
   2,339.05x = 3,227.89 × 1,291.12
4. Step 4: Simplify right side
   2,339.05x = 4,167,593.34
5. Step 5: Solve for x
   x = 4,167,593.34/2,339.05
6. Step 6: Final answer
   x = 1,781.75