Finding the Fourth Proportional to 2,339.56, 3,228.69 and 1,345.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.56 : 3,228.69 = 1,345.15 : x
2. Step 2: Convert to fraction form
   2,339.56/3,228.69 = 1,345.15/x
3. Step 3: Cross multiply
   2,339.56x = 3,228.69 × 1,345.15
4. Step 4: Simplify right side
   2,339.56x = 4,343,072.35
5. Step 5: Solve for x
   x = 4,343,072.35/2,339.56
6. Step 6: Final answer
   x = 1,856.36