Finding the Third Proportional to 12,820,388.50 and 19,824,556

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820,388.50 : 19,824,556 = 19,824,556 : x
2. Step 2: Convert to fraction form
   12,820,388.50/19,824,556 = 19,824,556/x
3. Step 3: Cross multiply
   12,820,388.50x = 19,824,556 × 19,824,556
4. Step 4: Simplify right side
   12,820,388.50x = 393,013,020,597,136
5. Step 5: Solve for x
   x = 393,013,020,597,136/12,820,388.50
6. Step 6: Final answer
   x = 30,655,312.87