Finding the Fourth Proportional to 1,446.61, 1,996.34 and 857.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.61 : 1,996.34 = 857.03 : x
2. Step 2: Convert to fraction form
   1,446.61/1,996.34 = 857.03/x
3. Step 3: Cross multiply
   1,446.61x = 1,996.34 × 857.03
4. Step 4: Simplify right side
   1,446.61x = 1,710,928.26
5. Step 5: Solve for x
   x = 1,710,928.26/1,446.61
6. Step 6: Final answer
   x = 1,182.72