Finding the Fourth Proportional to 1,483.50, 2,047.25 and 820.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.50 : 2,047.25 = 820.40 : x
2. Step 2: Convert to fraction form
   1,483.50/2,047.25 = 820.40/x
3. Step 3: Cross multiply
   1,483.50x = 2,047.25 × 820.40
4. Step 4: Simplify right side
   1,483.50x = 1,679,549.56
5. Step 5: Solve for x
   x = 1,679,549.56/1,483.50
6. Step 6: Final answer
   x = 1,132.15