Finding the Fourth Proportional to 1,446.80, 1,996.92 and 857.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.80 : 1,996.92 = 857.60 : x
2. Step 2: Convert to fraction form
   1,446.80/1,996.92 = 857.60/x
3. Step 3: Cross multiply
   1,446.80x = 1,996.92 × 857.60
4. Step 4: Simplify right side
   1,446.80x = 1,712,558.59
5. Step 5: Solve for x
   x = 1,712,558.59/1,446.80
6. Step 6: Final answer
   x = 1,183.69