Finding the Fourth Proportional to 2,578.23, 3,557.32 and 1,530.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.23 : 3,557.32 = 1,530.09 : x
2. Step 2: Convert to fraction form
   2,578.23/3,557.32 = 1,530.09/x
3. Step 3: Cross multiply
   2,578.23x = 3,557.32 × 1,530.09
4. Step 4: Simplify right side
   2,578.23x = 5,443,015.93
5. Step 5: Solve for x
   x = 5,443,015.93/2,578.23
6. Step 6: Final answer
   x = 2,111.14