Finding the Fourth Proportional to 1,942.49, 2,679.30 and 1,243.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.49 : 2,679.30 = 1,243.55 : x
2. Step 2: Convert to fraction form
   1,942.49/2,679.30 = 1,243.55/x
3. Step 3: Cross multiply
   1,942.49x = 2,679.30 × 1,243.55
4. Step 4: Simplify right side
   1,942.49x = 3,331,843.52
5. Step 5: Solve for x
   x = 3,331,843.52/1,942.49
6. Step 6: Final answer
   x = 1,715.24