Finding the Fourth Proportional to 1,643.50, 2,253.23 and 1,613.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.50 : 2,253.23 = 1,613.94 : x
2. Step 2: Convert to fraction form
   1,643.50/2,253.23 = 1,613.94/x
3. Step 3: Cross multiply
   1,643.50x = 2,253.23 × 1,613.94
4. Step 4: Simplify right side
   1,643.50x = 3,636,578.03
5. Step 5: Solve for x
   x = 3,636,578.03/1,643.50
6. Step 6: Final answer
   x = 2,212.70