Finding the Third Proportional to 1,438.31 and 3,119.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,438.31 : 3,119.63 = 3,119.63 : x
2. Step 2: Convert to fraction form
   1,438.31/3,119.63 = 3,119.63/x
3. Step 3: Cross multiply
   1,438.31x = 3,119.63 × 3,119.63
4. Step 4: Simplify right side
   1,438.31x = 9,732,060.14
5. Step 5: Solve for x
   x = 9,732,060.14/1,438.31
6. Step 6: Final answer
   x = 6,766.30