Finding the Fourth Proportional to 2,570.36, 3,854.52 and 926.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.36 : 3,854.52 = 926.40 : x
2. Step 2: Convert to fraction form
   2,570.36/3,854.52 = 926.40/x
3. Step 3: Cross multiply
   2,570.36x = 3,854.52 × 926.40
4. Step 4: Simplify right side
   2,570.36x = 3,570,827.33
5. Step 5: Solve for x
   x = 3,570,827.33/2,570.36
6. Step 6: Final answer
   x = 1,389.23