Finding the Fourth Proportional to 1,645.25, 2,270.72 and 946.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.25 : 2,270.72 = 946.49 : x
2. Step 2: Convert to fraction form
   1,645.25/2,270.72 = 946.49/x
3. Step 3: Cross multiply
   1,645.25x = 2,270.72 × 946.49
4. Step 4: Simplify right side
   1,645.25x = 2,149,213.77
5. Step 5: Solve for x
   x = 2,149,213.77/1,645.25
6. Step 6: Final answer
   x = 1,306.31