Finding the Fourth Proportional to 1,446.86, 1,995.98 and 857.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.86 : 1,995.98 = 857.40 : x
2. Step 2: Convert to fraction form
   1,446.86/1,995.98 = 857.40/x
3. Step 3: Cross multiply
   1,446.86x = 1,995.98 × 857.40
4. Step 4: Simplify right side
   1,446.86x = 1,711,353.25
5. Step 5: Solve for x
   x = 1,711,353.25/1,446.86
6. Step 6: Final answer
   x = 1,182.81