Finding the Fourth Proportional to 2,577.72, 3,557.22 and 1,569.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.72 : 3,557.22 = 1,569.09 : x
2. Step 2: Convert to fraction form
   2,577.72/3,557.22 = 1,569.09/x
3. Step 3: Cross multiply
   2,577.72x = 3,557.22 × 1,569.09
4. Step 4: Simplify right side
   2,577.72x = 5,581,605.79
5. Step 5: Solve for x
   x = 5,581,605.79/2,577.72
6. Step 6: Final answer
   x = 2,165.32