Finding the Fourth Proportional to 1,901.72, 2,853.46 and 806.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,901.72 : 2,853.46 = 806.34 : x
2. Step 2: Convert to fraction form
   1,901.72/2,853.46 = 806.34/x
3. Step 3: Cross multiply
   1,901.72x = 2,853.46 × 806.34
4. Step 4: Simplify right side
   1,901.72x = 2,300,858.94
5. Step 5: Solve for x
   x = 2,300,858.94/1,901.72
6. Step 6: Final answer
   x = 1,209.88