Finding the Third Proportional to 19,404,649.50 and 39,379,509

Step by Step Solution

1. Step 1: Write the proportion equation
   19,404,649.50 : 39,379,509 = 39,379,509 : x
2. Step 2: Convert to fraction form
   19,404,649.50/39,379,509 = 39,379,509/x
3. Step 3: Cross multiply
   19,404,649.50x = 39,379,509 × 39,379,509
4. Step 4: Simplify right side
   19,404,649.50x = 1,550,745,729,081,081
5. Step 5: Solve for x
   x = 1,550,745,729,081,081/19,404,649.50
6. Step 6: Final answer
   x = 79,916,193.75