Finding the Fourth Proportional to 1,343.56, 1,854.12 and 819.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.56 : 1,854.12 = 819.88 : x
2. Step 2: Convert to fraction form
   1,343.56/1,854.12 = 819.88/x
3. Step 3: Cross multiply
   1,343.56x = 1,854.12 × 819.88
4. Step 4: Simplify right side
   1,343.56x = 1,520,155.91
5. Step 5: Solve for x
   x = 1,520,155.91/1,343.56
6. Step 6: Final answer
   x = 1,131.44