Finding the Fourth Proportional to 2,567.30, 3,542.87 and 1,388.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,567.30 : 3,542.87 = 1,388.37 : x
2. Step 2: Convert to fraction form
   2,567.30/3,542.87 = 1,388.37/x
3. Step 3: Cross multiply
   2,567.30x = 3,542.87 × 1,388.37
4. Step 4: Simplify right side
   2,567.30x = 4,918,817.89
5. Step 5: Solve for x
   x = 4,918,817.89/2,567.30
6. Step 6: Final answer
   x = 1,915.95