Finding the Fourth Proportional to 1,645.48, 2,271.54 and 946.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.48 : 2,271.54 = 946.72 : x
2. Step 2: Convert to fraction form
   1,645.48/2,271.54 = 946.72/x
3. Step 3: Cross multiply
   1,645.48x = 2,271.54 × 946.72
4. Step 4: Simplify right side
   1,645.48x = 2,150,512.35
5. Step 5: Solve for x
   x = 2,150,512.35/1,645.48
6. Step 6: Final answer
   x = 1,306.92