Finding the Fourth Proportional to 2,166.72, 3,251.52 and 1,678.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166.72 : 3,251.52 = 1,678.08 : x
2. Step 2: Convert to fraction form
   2,166.72/3,251.52 = 1,678.08/x
3. Step 3: Cross multiply
   2,166.72x = 3,251.52 × 1,678.08
4. Step 4: Simplify right side
   2,166.72x = 5,456,310.68
5. Step 5: Solve for x
   x = 5,456,310.68/2,166.72
6. Step 6: Final answer
   x = 2,518.24