Finding the Fourth Proportional to 2,335.50, 3,222.99 and 1,287.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.50 : 3,222.99 = 1,287.63 : x
2. Step 2: Convert to fraction form
   2,335.50/3,222.99 = 1,287.63/x
3. Step 3: Cross multiply
   2,335.50x = 3,222.99 × 1,287.63
4. Step 4: Simplify right side
   2,335.50x = 4,150,018.61
5. Step 5: Solve for x
   x = 4,150,018.61/2,335.50
6. Step 6: Final answer
   x = 1,776.93