Finding the Fourth Proportional to 1,483.21, 2,046.91 and 820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.21 : 2,046.91 = 820.10 : x
2. Step 2: Convert to fraction form
   1,483.21/2,046.91 = 820.10/x
3. Step 3: Cross multiply
   1,483.21x = 2,046.91 × 820.10
4. Step 4: Simplify right side
   1,483.21x = 1,678,670.89
5. Step 5: Solve for x
   x = 1,678,670.89/1,483.21
6. Step 6: Final answer
   x = 1,131.78