Finding the Fourth Proportional to 2,293.89, 3,439.76 and 1,123.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,293.89 : 3,439.76 = 1,123.95 : x
2. Step 2: Convert to fraction form
   2,293.89/3,439.76 = 1,123.95/x
3. Step 3: Cross multiply
   2,293.89x = 3,439.76 × 1,123.95
4. Step 4: Simplify right side
   2,293.89x = 3,866,118.25
5. Step 5: Solve for x
   x = 3,866,118.25/2,293.89
6. Step 6: Final answer
   x = 1,685.40