Finding the Fourth Proportional to 1,483.62, 2,047.20 and 820.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.62 : 2,047.20 = 820.30 : x
2. Step 2: Convert to fraction form
   1,483.62/2,047.20 = 820.30/x
3. Step 3: Cross multiply
   1,483.62x = 2,047.20 × 820.30
4. Step 4: Simplify right side
   1,483.62x = 1,679,318.16
5. Step 5: Solve for x
   x = 1,679,318.16/1,483.62
6. Step 6: Final answer
   x = 1,131.91