Finding the Fourth Proportional to 2,578.31, 3,558.99 and 1,530.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.31 : 3,558.99 = 1,530.38 : x
2. Step 2: Convert to fraction form
   2,578.31/3,558.99 = 1,530.38/x
3. Step 3: Cross multiply
   2,578.31x = 3,558.99 × 1,530.38
4. Step 4: Simplify right side
   2,578.31x = 5,446,595.06
5. Step 5: Solve for x
   x = 5,446,595.06/2,578.31
6. Step 6: Final answer
   x = 2,112.47