Finding the Fourth Proportional to 2,339.89, 3,228.96 and 1,345.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.89 : 3,228.96 = 1,345.15 : x
2. Step 2: Convert to fraction form
   2,339.89/3,228.96 = 1,345.15/x
3. Step 3: Cross multiply
   2,339.89x = 3,228.96 × 1,345.15
4. Step 4: Simplify right side
   2,339.89x = 4,343,444.62
5. Step 5: Solve for x
   x = 4,343,444.62/2,339.89
6. Step 6: Final answer
   x = 1,856.26