Finding the Fourth Proportional to 2,335.94, 3,223.60 and 1,288.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.94 : 3,223.60 = 1,288.00 : x
2. Step 2: Convert to fraction form
   2,335.94/3,223.60 = 1,288.00/x
3. Step 3: Cross multiply
   2,335.94x = 3,223.60 × 1,288.00
4. Step 4: Simplify right side
   2,335.94x = 4,151,997.61
5. Step 5: Solve for x
   x = 4,151,997.61/2,335.94
6. Step 6: Final answer
   x = 1,777.44