Finding the Fourth Proportional to 2,825.10, 4,238.28 and 1,070.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,825.10 : 4,238.28 = 1,070.09 : x
2. Step 2: Convert to fraction form
   2,825.10/4,238.28 = 1,070.09/x
3. Step 3: Cross multiply
   2,825.10x = 4,238.28 × 1,070.09
4. Step 4: Simplify right side
   2,825.10x = 4,535,351.40
5. Step 5: Solve for x
   x = 4,535,351.40/2,825.10
6. Step 6: Final answer
   x = 1,605.38