Finding the Fourth Proportional to 2,269.34, 3,396.72 and 1,172.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,269.34 : 3,396.72 = 1,172.21 : x
2. Step 2: Convert to fraction form
   2,269.34/3,396.72 = 1,172.21/x
3. Step 3: Cross multiply
   2,269.34x = 3,396.72 × 1,172.21
4. Step 4: Simplify right side
   2,269.34x = 3,981,669.15
5. Step 5: Solve for x
   x = 3,981,669.15/2,269.34
6. Step 6: Final answer
   x = 1,754.55