Finding the Fourth Proportional to 2,570.12, 3,855.50 and 926.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.12 : 3,855.50 = 926.24 : x
2. Step 2: Convert to fraction form
   2,570.12/3,855.50 = 926.24/x
3. Step 3: Cross multiply
   2,570.12x = 3,855.50 × 926.24
4. Step 4: Simplify right side
   2,570.12x = 3,571,118.32
5. Step 5: Solve for x
   x = 3,571,118.32/2,570.12
6. Step 6: Final answer
   x = 1,389.48