Finding the Third Proportional to 209,043 and 315,523.69

Step by Step Solution

1. Step 1: Write the proportion equation
   209,043 : 315,523.69 = 315,523.69 : x
2. Step 2: Convert to fraction form
   209,043/315,523.69 = 315,523.69/x
3. Step 3: Cross multiply
   209,043x = 315,523.69 × 315,523.69
4. Step 4: Simplify right side
   209,043x = 99,555,197,373.60
5. Step 5: Solve for x
   x = 99,555,197,373.60/209,043
6. Step 6: Final answer
   x = 476,242.67