Finding the Fourth Proportional to 1,483.99, 2,047.89 and 820.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.99 : 2,047.89 = 820.87 : x
2. Step 2: Convert to fraction form
   1,483.99/2,047.89 = 820.87/x
3. Step 3: Cross multiply
   1,483.99x = 2,047.89 × 820.87
4. Step 4: Simplify right side
   1,483.99x = 1,681,051.46
5. Step 5: Solve for x
   x = 1,681,051.46/1,483.99
6. Step 6: Final answer
   x = 1,132.79