Finding the Fourth Proportional to 2,296.55, 3,169.42 and 1,288.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,296.55 : 3,169.42 = 1,288.23 : x
2. Step 2: Convert to fraction form
   2,296.55/3,169.42 = 1,288.23/x
3. Step 3: Cross multiply
   2,296.55x = 3,169.42 × 1,288.23
4. Step 4: Simplify right side
   2,296.55x = 4,082,938.71
5. Step 5: Solve for x
   x = 4,082,938.71/2,296.55
6. Step 6: Final answer
   x = 1,777.86