Finding the Fourth Proportional to 1,356.37, 1,871.83 and 884.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.37 : 1,871.83 = 884.57 : x
2. Step 2: Convert to fraction form
   1,356.37/1,871.83 = 884.57/x
3. Step 3: Cross multiply
   1,356.37x = 1,871.83 × 884.57
4. Step 4: Simplify right side
   1,356.37x = 1,655,764.66
5. Step 5: Solve for x
   x = 1,655,764.66/1,356.37
6. Step 6: Final answer
   x = 1,220.73