Finding the Third Proportional to 1,283.91 and 1,999.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,283.91 : 1,999.69 = 1,999.69 : x
2. Step 2: Convert to fraction form
   1,283.91/1,999.69 = 1,999.69/x
3. Step 3: Cross multiply
   1,283.91x = 1,999.69 × 1,999.69
4. Step 4: Simplify right side
   1,283.91x = 3,998,750.10
5. Step 5: Solve for x
   x = 3,998,750.10/1,283.91
6. Step 6: Final answer
   x = 3,114.52