Finding the Fourth Proportional to 3,638.09, 5,453.89 and 1,557.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.09 : 5,453.89 = 1,557.03 : x
2. Step 2: Convert to fraction form
   3,638.09/5,453.89 = 1,557.03/x
3. Step 3: Cross multiply
   3,638.09x = 5,453.89 × 1,557.03
4. Step 4: Simplify right side
   3,638.09x = 8,491,840.89
5. Step 5: Solve for x
   x = 8,491,840.89/3,638.09
6. Step 6: Final answer
   x = 2,334.15