Finding the Third Proportional to 11,395,909 and 17,621,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,395,909 : 17,621,839.50 = 17,621,839.50 : x
2. Step 2: Convert to fraction form
   11,395,909/17,621,839.50 = 17,621,839.50/x
3. Step 3: Cross multiply
   11,395,909x = 17,621,839.50 × 17,621,839.50
4. Step 4: Simplify right side
   11,395,909x = 310,529,227,363,760.25
5. Step 5: Solve for x
   x = 310,529,227,363,760.25/11,395,909
6. Step 6: Final answer
   x = 27,249,184.54