Finding the Third Proportional to 128,746 and 269,260

Step by Step Solution

1. Step 1: Write the proportion equation
   128,746 : 269,260 = 269,260 : x
2. Step 2: Convert to fraction form
   128,746/269,260 = 269,260/x
3. Step 3: Cross multiply
   128,746x = 269,260 × 269,260
4. Step 4: Simplify right side
   128,746x = 72,500,947,600
5. Step 5: Solve for x
   x = 72,500,947,600/128,746
6. Step 6: Final answer
   x = 563,131.65