Finding the Fourth Proportional to 1,483.56, 2,047.28 and 820.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.56 : 2,047.28 = 820.39 : x
2. Step 2: Convert to fraction form
   1,483.56/2,047.28 = 820.39/x
3. Step 3: Cross multiply
   1,483.56x = 2,047.28 × 820.39
4. Step 4: Simplify right side
   1,483.56x = 1,679,568.04
5. Step 5: Solve for x
   x = 1,679,568.04/1,483.56
6. Step 6: Final answer
   x = 1,132.12