Finding the Fourth Proportional to 2,570.38, 3,856.18 and 926.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.38 : 3,856.18 = 926.94 : x
2. Step 2: Convert to fraction form
   2,570.38/3,856.18 = 926.94/x
3. Step 3: Cross multiply
   2,570.38x = 3,856.18 × 926.94
4. Step 4: Simplify right side
   2,570.38x = 3,574,442.85
5. Step 5: Solve for x
   x = 3,574,442.85/2,570.38
6. Step 6: Final answer
   x = 1,390.63