Finding the Fourth Proportional to 2,578.56, 3,557.01 and 2,225.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.56 : 3,557.01 = 2,225.94 : x
2. Step 2: Convert to fraction form
   2,578.56/3,557.01 = 2,225.94/x
3. Step 3: Cross multiply
   2,578.56x = 3,557.01 × 2,225.94
4. Step 4: Simplify right side
   2,578.56x = 7,917,690.84
5. Step 5: Solve for x
   x = 7,917,690.84/2,578.56
6. Step 6: Final answer
   x = 3,070.59