Finding the Third Proportional to 259,776 and 558,371.25

Step by Step Solution

1. Step 1: Write the proportion equation
   259,776 : 558,371.25 = 558,371.25 : x
2. Step 2: Convert to fraction form
   259,776/558,371.25 = 558,371.25/x
3. Step 3: Cross multiply
   259,776x = 558,371.25 × 558,371.25
4. Step 4: Simplify right side
   259,776x = 311,778,452,826.56
5. Step 5: Solve for x
   x = 311,778,452,826.56/259,776
6. Step 6: Final answer
   x = 1,200,181.90