Finding the Fourth Proportional to 1,483.31, 2,046.87 and 820.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.31 : 2,046.87 = 820.13 : x
2. Step 2: Convert to fraction form
   1,483.31/2,046.87 = 820.13/x
3. Step 3: Cross multiply
   1,483.31x = 2,046.87 × 820.13
4. Step 4: Simplify right side
   1,483.31x = 1,678,689.26
5. Step 5: Solve for x
   x = 1,678,689.26/1,483.31
6. Step 6: Final answer
   x = 1,131.72