Finding the Fourth Proportional to 1,483.40, 2,047.12 and 820.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.40 : 2,047.12 = 820.28 : x
2. Step 2: Convert to fraction form
   1,483.40/2,047.12 = 820.28/x
3. Step 3: Cross multiply
   1,483.40x = 2,047.12 × 820.28
4. Step 4: Simplify right side
   1,483.40x = 1,679,207.76
5. Step 5: Solve for x
   x = 1,679,207.76/1,483.40
6. Step 6: Final answer
   x = 1,132.00