Finding the Fourth Proportional to 1,356.45, 1,871.74 and 825.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.45 : 1,871.74 = 825.46 : x
2. Step 2: Convert to fraction form
   1,356.45/1,871.74 = 825.46/x
3. Step 3: Cross multiply
   1,356.45x = 1,871.74 × 825.46
4. Step 4: Simplify right side
   1,356.45x = 1,545,046.50
5. Step 5: Solve for x
   x = 1,545,046.50/1,356.45
6. Step 6: Final answer
   x = 1,139.04