Finding the Fourth Proportional to 1,356.51, 1,871.52 and 825.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.51 : 1,871.52 = 825.18 : x
2. Step 2: Convert to fraction form
   1,356.51/1,871.52 = 825.18/x
3. Step 3: Cross multiply
   1,356.51x = 1,871.52 × 825.18
4. Step 4: Simplify right side
   1,356.51x = 1,544,340.87
5. Step 5: Solve for x
   x = 1,544,340.87/1,356.51
6. Step 6: Final answer
   x = 1,138.47