Finding the Fourth Proportional to 2,262.89, 3,122.80 and 1,318.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,262.89 : 3,122.80 = 1,318.61 : x
2. Step 2: Convert to fraction form
   2,262.89/3,122.80 = 1,318.61/x
3. Step 3: Cross multiply
   2,262.89x = 3,122.80 × 1,318.61
4. Step 4: Simplify right side
   2,262.89x = 4,117,759.82
5. Step 5: Solve for x
   x = 4,117,759.82/2,262.89
6. Step 6: Final answer
   x = 1,819.69