Finding the Fourth Proportional to 1,343.69, 1,854.49 and 820.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.69 : 1,854.49 = 820.03 : x
2. Step 2: Convert to fraction form
   1,343.69/1,854.49 = 820.03/x
3. Step 3: Cross multiply
   1,343.69x = 1,854.49 × 820.03
4. Step 4: Simplify right side
   1,343.69x = 1,520,728.16
5. Step 5: Solve for x
   x = 1,520,728.16/1,343.69
6. Step 6: Final answer
   x = 1,131.76