Finding the Fourth Proportional to 2,581.79, 3,874.22 and 938.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.79 : 3,874.22 = 938.46 : x
2. Step 2: Convert to fraction form
   2,581.79/3,874.22 = 938.46/x
3. Step 3: Cross multiply
   2,581.79x = 3,874.22 × 938.46
4. Step 4: Simplify right side
   2,581.79x = 3,635,795.81
5. Step 5: Solve for x
   x = 3,635,795.81/2,581.79
6. Step 6: Final answer
   x = 1,408.25