Finding the Fourth Proportional to 2,456.07, 3,679.98 and 1,939.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.07 : 3,679.98 = 1,939.42 : x
2. Step 2: Convert to fraction form
   2,456.07/3,679.98 = 1,939.42/x
3. Step 3: Cross multiply
   2,456.07x = 3,679.98 × 1,939.42
4. Step 4: Simplify right side
   2,456.07x = 7,137,026.81
5. Step 5: Solve for x
   x = 7,137,026.81/2,456.07
6. Step 6: Final answer
   x = 2,905.87