Finding the Fourth Proportional to 2,582.57, 3,874.31 and 938.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,582.57 : 3,874.31 = 938.98 : x
2. Step 2: Convert to fraction form
   2,582.57/3,874.31 = 938.98/x
3. Step 3: Cross multiply
   2,582.57x = 3,874.31 × 938.98
4. Step 4: Simplify right side
   2,582.57x = 3,637,899.60
5. Step 5: Solve for x
   x = 3,637,899.60/2,582.57
6. Step 6: Final answer
   x = 1,408.64