Finding the Fourth Proportional to 1,718.62, 2,341.91 and 1,678.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,718.62 : 2,341.91 = 1,678.52 : x
2. Step 2: Convert to fraction form
   1,718.62/2,341.91 = 1,678.52/x
3. Step 3: Cross multiply
   1,718.62x = 2,341.91 × 1,678.52
4. Step 4: Simplify right side
   1,718.62x = 3,930,952.82
5. Step 5: Solve for x
   x = 3,930,952.82/1,718.62
6. Step 6: Final answer
   x = 2,287.28