Finding the Fourth Proportional to 2,567.39, 3,542.99 and 1,388.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,567.39 : 3,542.99 = 1,388.48 : x
2. Step 2: Convert to fraction form
   2,567.39/3,542.99 = 1,388.48/x
3. Step 3: Cross multiply
   2,567.39x = 3,542.99 × 1,388.48
4. Step 4: Simplify right side
   2,567.39x = 4,919,346.10
5. Step 5: Solve for x
   x = 4,919,346.10/2,567.39
6. Step 6: Final answer
   x = 1,916.09