Finding the Third Proportional to 261,783 and 558,540

Step by Step Solution

1. Step 1: Write the proportion equation
   261,783 : 558,540 = 558,540 : x
2. Step 2: Convert to fraction form
   261,783/558,540 = 558,540/x
3. Step 3: Cross multiply
   261,783x = 558,540 × 558,540
4. Step 4: Simplify right side
   261,783x = 311,966,931,600
5. Step 5: Solve for x
   x = 311,966,931,600/261,783
6. Step 6: Final answer
   x = 1,191,700.50