Finding the Fourth Proportional to 1,342.72, 1,853.28 and 819.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.72 : 1,853.28 = 819.04 : x
2. Step 2: Convert to fraction form
   1,342.72/1,853.28 = 819.04/x
3. Step 3: Cross multiply
   1,342.72x = 1,853.28 × 819.04
4. Step 4: Simplify right side
   1,342.72x = 1,517,910.45
5. Step 5: Solve for x
   x = 1,517,910.45/1,342.72
6. Step 6: Final answer
   x = 1,130.47