Finding the Third Proportional to 1,990.69 and 3,079.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.69 : 3,079.69 = 3,079.69 : x
2. Step 2: Convert to fraction form
   1,990.69/3,079.69 = 3,079.69/x
3. Step 3: Cross multiply
   1,990.69x = 3,079.69 × 3,079.69
4. Step 4: Simplify right side
   1,990.69x = 9,484,475.10
5. Step 5: Solve for x
   x = 9,484,475.10/1,990.69
6. Step 6: Final answer
   x = 4,764.42