Finding the Third Proportional to 209,160 and 323,187.50

Step by Step Solution

1. Step 1: Write the proportion equation
   209,160 : 323,187.50 = 323,187.50 : x
2. Step 2: Convert to fraction form
   209,160/323,187.50 = 323,187.50/x
3. Step 3: Cross multiply
   209,160x = 323,187.50 × 323,187.50
4. Step 4: Simplify right side
   209,160x = 104,450,160,156.25
5. Step 5: Solve for x
   x = 104,450,160,156.25/209,160
6. Step 6: Final answer
   x = 499,379.23