Finding the Third Proportional to 20,861,902.50 and 42,313,362

Step by Step Solution

1. Step 1: Write the proportion equation
   20,861,902.50 : 42,313,362 = 42,313,362 : x
2. Step 2: Convert to fraction form
   20,861,902.50/42,313,362 = 42,313,362/x
3. Step 3: Cross multiply
   20,861,902.50x = 42,313,362 × 42,313,362
4. Step 4: Simplify right side
   20,861,902.50x = 1,790,420,603,743,044
5. Step 5: Solve for x
   x = 1,790,420,603,743,044/20,861,902.50
6. Step 6: Final answer
   x = 85,822,498.87