Finding the Fourth Proportional to 2,578.82, 3,561.72 and 1,698.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.82 : 3,561.72 = 1,698.56 : x
2. Step 2: Convert to fraction form
   2,578.82/3,561.72 = 1,698.56/x
3. Step 3: Cross multiply
   2,578.82x = 3,561.72 × 1,698.56
4. Step 4: Simplify right side
   2,578.82x = 6,049,795.12
5. Step 5: Solve for x
   x = 6,049,795.12/2,578.82
6. Step 6: Final answer
   x = 2,345.95