Finding the Third Proportional to 128,974 and 280,973

Step by Step Solution

1. Step 1: Write the proportion equation
   128,974 : 280,973 = 280,973 : x
2. Step 2: Convert to fraction form
   128,974/280,973 = 280,973/x
3. Step 3: Cross multiply
   128,974x = 280,973 × 280,973
4. Step 4: Simplify right side
   128,974x = 78,945,826,729
5. Step 5: Solve for x
   x = 78,945,826,729/128,974
6. Step 6: Final answer
   x = 612,106.52