Finding the Fourth Proportional to 1,448.78, 1,999.09 and 819.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448.78 : 1,999.09 = 819.27 : x
2. Step 2: Convert to fraction form
   1,448.78/1,999.09 = 819.27/x
3. Step 3: Cross multiply
   1,448.78x = 1,999.09 × 819.27
4. Step 4: Simplify right side
   1,448.78x = 1,637,784.47
5. Step 5: Solve for x
   x = 1,637,784.47/1,448.78
6. Step 6: Final answer
   x = 1,130.46