Finding the Fourth Proportional to 2,335.43, 3,222.90 and 1,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,335.43 : 3,222.90 = 1,287.50 : x
2. Step 2: Convert to fraction form
   2,335.43/3,222.90 = 1,287.50/x
3. Step 3: Cross multiply
   2,335.43x = 3,222.90 × 1,287.50
4. Step 4: Simplify right side
   2,335.43x = 4,149,467.64
5. Step 5: Solve for x
   x = 4,149,467.64/2,335.43
6. Step 6: Final answer
   x = 1,776.74