Finding the Fourth Proportional to 1,448.48, 1,999.22 and 819.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448.48 : 1,999.22 = 819.37 : x
2. Step 2: Convert to fraction form
   1,448.48/1,999.22 = 819.37/x
3. Step 3: Cross multiply
   1,448.48x = 1,999.22 × 819.37
4. Step 4: Simplify right side
   1,448.48x = 1,638,097.94
5. Step 5: Solve for x
   x = 1,638,097.94/1,448.48
6. Step 6: Final answer
   x = 1,130.91