Finding the Fourth Proportional to 1,641.34, 2,460.71 and 819.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.34 : 2,460.71 = 819.19 : x
2. Step 2: Convert to fraction form
   1,641.34/2,460.71 = 819.19/x
3. Step 3: Cross multiply
   1,641.34x = 2,460.71 × 819.19
4. Step 4: Simplify right side
   1,641.34x = 2,015,794.15
5. Step 5: Solve for x
   x = 2,015,794.15/1,641.34
6. Step 6: Final answer
   x = 1,228.14