Finding the Third Proportional to 260,096 and 558,990

Step by Step Solution

1. Step 1: Write the proportion equation
   260,096 : 558,990 = 558,990 : x
2. Step 2: Convert to fraction form
   260,096/558,990 = 558,990/x
3. Step 3: Cross multiply
   260,096x = 558,990 × 558,990
4. Step 4: Simplify right side
   260,096x = 312,469,820,100
5. Step 5: Solve for x
   x = 312,469,820,100/260,096
6. Step 6: Final answer
   x = 1,201,363.42