Finding the Third Proportional to 558,858 and 886,383.50

Step by Step Solution

1. Step 1: Write the proportion equation
   558,858 : 886,383.50 = 886,383.50 : x
2. Step 2: Convert to fraction form
   558,858/886,383.50 = 886,383.50/x
3. Step 3: Cross multiply
   558,858x = 886,383.50 × 886,383.50
4. Step 4: Simplify right side
   558,858x = 785,675,709,072.25
5. Step 5: Solve for x
   x = 785,675,709,072.25/558,858
6. Step 6: Final answer
   x = 1,405,859.29