Finding the Fourth Proportional to 1,483.48, 2,047.11 and 820.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.48 : 2,047.11 = 820.30 : x
2. Step 2: Convert to fraction form
   1,483.48/2,047.11 = 820.30/x
3. Step 3: Cross multiply
   1,483.48x = 2,047.11 × 820.30
4. Step 4: Simplify right side
   1,483.48x = 1,679,244.33
5. Step 5: Solve for x
   x = 1,679,244.33/1,483.48
6. Step 6: Final answer
   x = 1,131.96