Finding the Third Proportional to 1,434.94 and 3,139.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.94 : 3,139.88 = 3,139.88 : x
2. Step 2: Convert to fraction form
   1,434.94/3,139.88 = 3,139.88/x
3. Step 3: Cross multiply
   1,434.94x = 3,139.88 × 3,139.88
4. Step 4: Simplify right side
   1,434.94x = 9,858,815.02
5. Step 5: Solve for x
   x = 9,858,815.02/1,434.94
6. Step 6: Final answer
   x = 6,870.55