Finding the Third Proportional to 259,421.63 and 558,864

Step by Step Solution

1. Step 1: Write the proportion equation
   259,421.63 : 558,864 = 558,864 : x
2. Step 2: Convert to fraction form
   259,421.63/558,864 = 558,864/x
3. Step 3: Cross multiply
   259,421.63x = 558,864 × 558,864
4. Step 4: Simplify right side
   259,421.63x = 312,328,970,496
5. Step 5: Solve for x
   x = 312,328,970,496/259,421.63
6. Step 6: Final answer
   x = 1,203,943.47