Finding the Fourth Proportional to 1,628.78, 2,248.31 and 1,069.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.78 : 2,248.31 = 1,069.38 : x
2. Step 2: Convert to fraction form
   1,628.78/2,248.31 = 1,069.38/x
3. Step 3: Cross multiply
   1,628.78x = 2,248.31 × 1,069.38
4. Step 4: Simplify right side
   1,628.78x = 2,404,297.75
5. Step 5: Solve for x
   x = 2,404,297.75/1,628.78
6. Step 6: Final answer
   x = 1,476.13