Finding the Fourth Proportional to 1,628.82, 2,247.69 and 920.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.82 : 2,247.69 = 920.73 : x
2. Step 2: Convert to fraction form
   1,628.82/2,247.69 = 920.73/x
3. Step 3: Cross multiply
   1,628.82x = 2,247.69 × 920.73
4. Step 4: Simplify right side
   1,628.82x = 2,069,515.61
5. Step 5: Solve for x
   x = 2,069,515.61/1,628.82
6. Step 6: Final answer
   x = 1,270.56