Finding the Fourth Proportional to 2,557.57, 3,529.32 and 1,564.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.57 : 3,529.32 = 1,564.51 : x
2. Step 2: Convert to fraction form
   2,557.57/3,529.32 = 1,564.51/x
3. Step 3: Cross multiply
   2,557.57x = 3,529.32 × 1,564.51
4. Step 4: Simplify right side
   2,557.57x = 5,521,656.43
5. Step 5: Solve for x
   x = 5,521,656.43/2,557.57
6. Step 6: Final answer
   x = 2,158.95