Finding the Fourth Proportional to 1,447.02, 1,996.80 and 857.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.02 : 1,996.80 = 857.34 : x
2. Step 2: Convert to fraction form
   1,447.02/1,996.80 = 857.34/x
3. Step 3: Cross multiply
   1,447.02x = 1,996.80 × 857.34
4. Step 4: Simplify right side
   1,447.02x = 1,711,936.51
5. Step 5: Solve for x
   x = 1,711,936.51/1,447.02
6. Step 6: Final answer
   x = 1,183.08