Finding the Fourth Proportional to 2,336.05, 3,223.74 and 1,288.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,336.05 : 3,223.74 = 1,288.12 : x
2. Step 2: Convert to fraction form
   2,336.05/3,223.74 = 1,288.12/x
3. Step 3: Cross multiply
   2,336.05x = 3,223.74 × 1,288.12
4. Step 4: Simplify right side
   2,336.05x = 4,152,563.97
5. Step 5: Solve for x
   x = 4,152,563.97/2,336.05
6. Step 6: Final answer
   x = 1,777.60