Finding the Fourth Proportional to 2,567.21, 3,851.15 and 923.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,567.21 : 3,851.15 = 923.63 : x
2. Step 2: Convert to fraction form
   2,567.21/3,851.15 = 923.63/x
3. Step 3: Cross multiply
   2,567.21x = 3,851.15 × 923.63
4. Step 4: Simplify right side
   2,567.21x = 3,557,013.80
5. Step 5: Solve for x
   x = 3,557,013.80/2,567.21
6. Step 6: Final answer
   x = 1,385.56