Finding the Third Proportional to 1,990.69 and 2,784.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.69 : 2,784.09 = 2,784.09 : x
2. Step 2: Convert to fraction form
   1,990.69/2,784.09 = 2,784.09/x
3. Step 3: Cross multiply
   1,990.69x = 2,784.09 × 2,784.09
4. Step 4: Simplify right side
   1,990.69x = 7,751,178.01
5. Step 5: Solve for x
   x = 7,751,178.01/1,990.69
6. Step 6: Final answer
   x = 3,893.72