Finding the Fourth Proportional to 2,336.78, 3,224.69 and 1,288.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,336.78 : 3,224.69 = 1,288.84 : x
2. Step 2: Convert to fraction form
   2,336.78/3,224.69 = 1,288.84/x
3. Step 3: Cross multiply
   2,336.78x = 3,224.69 × 1,288.84
4. Step 4: Simplify right side
   2,336.78x = 4,156,109.46
5. Step 5: Solve for x
   x = 4,156,109.46/2,336.78
6. Step 6: Final answer
   x = 1,778.56