Finding the Fourth Proportional to 2,297.80, 3,171.72 and 1,636.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,297.80 : 3,171.72 = 1,636.57 : x
2. Step 2: Convert to fraction form
   2,297.80/3,171.72 = 1,636.57/x
3. Step 3: Cross multiply
   2,297.80x = 3,171.72 × 1,636.57
4. Step 4: Simplify right side
   2,297.80x = 5,190,741.80
5. Step 5: Solve for x
   x = 5,190,741.80/2,297.80
6. Step 6: Final answer
   x = 2,259.01