Finding the Third Proportional to 1,384.69 and 1,999.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.69 : 1,999.31 = 1,999.31 : x
2. Step 2: Convert to fraction form
   1,384.69/1,999.31 = 1,999.31/x
3. Step 3: Cross multiply
   1,384.69x = 1,999.31 × 1,999.31
4. Step 4: Simplify right side
   1,384.69x = 3,997,250.47
5. Step 5: Solve for x
   x = 3,997,250.47/1,384.69
6. Step 6: Final answer
   x = 2,886.75