Finding the Third Proportional to 1,276.69 and 2,106.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,276.69 : 2,106.38 = 2,106.38 : x
2. Step 2: Convert to fraction form
   1,276.69/2,106.38 = 2,106.38/x
3. Step 3: Cross multiply
   1,276.69x = 2,106.38 × 2,106.38
4. Step 4: Simplify right side
   1,276.69x = 4,436,815.64
5. Step 5: Solve for x
   x = 4,436,815.64/1,276.69
6. Step 6: Final answer
   x = 3,475.26