Finding the Third Proportional to 259,809.50 and 558,297

Step by Step Solution

1. Step 1: Write the proportion equation
   259,809.50 : 558,297 = 558,297 : x
2. Step 2: Convert to fraction form
   259,809.50/558,297 = 558,297/x
3. Step 3: Cross multiply
   259,809.50x = 558,297 × 558,297
4. Step 4: Simplify right side
   259,809.50x = 311,695,540,209
5. Step 5: Solve for x
   x = 311,695,540,209/259,809.50
6. Step 6: Final answer
   x = 1,199,708.02