Finding the Fourth Proportional to 1,483.89, 2,047.61 and 820.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.89 : 2,047.61 = 820.64 : x
2. Step 2: Convert to fraction form
   1,483.89/2,047.61 = 820.64/x
3. Step 3: Cross multiply
   1,483.89x = 2,047.61 × 820.64
4. Step 4: Simplify right side
   1,483.89x = 1,680,357.84
5. Step 5: Solve for x
   x = 1,680,357.84/1,483.89
6. Step 6: Final answer
   x = 1,132.40