Finding the Third Proportional to 30,603,699 and 64,661,401.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,603,699 : 64,661,401.50 = 64,661,401.50 : x
2. Step 2: Convert to fraction form
   30,603,699/64,661,401.50 = 64,661,401.50/x
3. Step 3: Cross multiply
   30,603,699x = 64,661,401.50 × 64,661,401.50
4. Step 4: Simplify right side
   30,603,699x = 4,181,096,843,944,202
5. Step 5: Solve for x
   x = 4,181,096,843,944,202/30,603,699
6. Step 6: Final answer
   x = 136,620,636.74