Finding the Fourth Proportional to 846.34, 1,259.89 and 806.58

Step by Step Solution

1. Step 1: Write the proportion equation
   846.34 : 1,259.89 = 806.58 : x
2. Step 2: Convert to fraction form
   846.34/1,259.89 = 806.58/x
3. Step 3: Cross multiply
   846.34x = 1,259.89 × 806.58
4. Step 4: Simplify right side
   846.34x = 1,016,198.04
5. Step 5: Solve for x
   x = 1,016,198.04/846.34
6. Step 6: Final answer
   x = 1,200.70