Finding the Fourth Proportional to 2,274.96, 3,139.41 and 1,390.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,274.96 : 3,139.41 = 1,390.62 : x
2. Step 2: Convert to fraction form
   2,274.96/3,139.41 = 1,390.62/x
3. Step 3: Cross multiply
   2,274.96x = 3,139.41 × 1,390.62
4. Step 4: Simplify right side
   2,274.96x = 4,365,726.33
5. Step 5: Solve for x
   x = 4,365,726.33/2,274.96
6. Step 6: Final answer
   x = 1,919.03