Finding the Third Proportional to 200,373 and 421,495.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,373 : 421,495.50 = 421,495.50 : x
2. Step 2: Convert to fraction form
   200,373/421,495.50 = 421,495.50/x
3. Step 3: Cross multiply
   200,373x = 421,495.50 × 421,495.50
4. Step 4: Simplify right side
   200,373x = 177,658,456,520.25
5. Step 5: Solve for x
   x = 177,658,456,520.25/200,373
6. Step 6: Final answer
   x = 886,638.70