Finding the Fourth Proportional to 2,387.59, 3,297.37 and 1,643.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.59 : 3,297.37 = 1,643.47 : x
2. Step 2: Convert to fraction form
   2,387.59/3,297.37 = 1,643.47/x
3. Step 3: Cross multiply
   2,387.59x = 3,297.37 × 1,643.47
4. Step 4: Simplify right side
   2,387.59x = 5,419,128.67
5. Step 5: Solve for x
   x = 5,419,128.67/2,387.59
6. Step 6: Final answer
   x = 2,269.71