Finding the Fourth Proportional to 2,339.58, 3,228.62 and 1,345.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.58 : 3,228.62 = 1,345.05 : x
2. Step 2: Convert to fraction form
   2,339.58/3,228.62 = 1,345.05/x
3. Step 3: Cross multiply
   2,339.58x = 3,228.62 × 1,345.05
4. Step 4: Simplify right side
   2,339.58x = 4,342,648.61
5. Step 5: Solve for x
   x = 4,342,648.61/2,339.58
6. Step 6: Final answer
   x = 1,856.17