Finding the Fourth Proportional to 1,356.48, 1,871.30 and 884.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.48 : 1,871.30 = 884.39 : x
2. Step 2: Convert to fraction form
   1,356.48/1,871.30 = 884.39/x
3. Step 3: Cross multiply
   1,356.48x = 1,871.30 × 884.39
4. Step 4: Simplify right side
   1,356.48x = 1,654,951.86
5. Step 5: Solve for x
   x = 1,654,951.86/1,356.48
6. Step 6: Final answer
   x = 1,220.03