Finding the Fourth Proportional to 2,335.74, 3,223.32 and 1,287.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.74 : 3,223.32 = 1,287.80 : x
2. Step 2: Convert to fraction form
   2,335.74/3,223.32 = 1,287.80/x
3. Step 3: Cross multiply
   2,335.74x = 3,223.32 × 1,287.80
4. Step 4: Simplify right side
   2,335.74x = 4,150,991.50
5. Step 5: Solve for x
   x = 4,150,991.50/2,335.74
6. Step 6: Final answer
   x = 1,777.16