Finding the Fourth Proportional to 1,483.61, 2,047.35 and 820.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.61 : 2,047.35 = 820.45 : x
2. Step 2: Convert to fraction form
   1,483.61/2,047.35 = 820.45/x
3. Step 3: Cross multiply
   1,483.61x = 2,047.35 × 820.45
4. Step 4: Simplify right side
   1,483.61x = 1,679,743.19
5. Step 5: Solve for x
   x = 1,679,743.19/1,483.61
6. Step 6: Final answer
   x = 1,132.20