Finding the Fourth Proportional to 2,336.81, 3,224.82 and 1,288.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,336.81 : 3,224.82 = 1,288.91 : x
2. Step 2: Convert to fraction form
   2,336.81/3,224.82 = 1,288.91/x
3. Step 3: Cross multiply
   2,336.81x = 3,224.82 × 1,288.91
4. Step 4: Simplify right side
   2,336.81x = 4,156,502.75
5. Step 5: Solve for x
   x = 4,156,502.75/2,336.81
6. Step 6: Final answer
   x = 1,778.71