Finding the Fourth Proportional to 1,392.38, 2,086.14 and 1,241.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.38 : 2,086.14 = 1,241.72 : x
2. Step 2: Convert to fraction form
   1,392.38/2,086.14 = 1,241.72/x
3. Step 3: Cross multiply
   1,392.38x = 2,086.14 × 1,241.72
4. Step 4: Simplify right side
   1,392.38x = 2,590,401.76
5. Step 5: Solve for x
   x = 2,590,401.76/1,392.38
6. Step 6: Final answer
   x = 1,860.41