Finding the Third Proportional to 64,466,973 and 139,143,172.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,466,973 : 139,143,172.50 = 139,143,172.50 : x
2. Step 2: Convert to fraction form
   64,466,973/139,143,172.50 = 139,143,172.50/x
3. Step 3: Cross multiply
   64,466,973x = 139,143,172.50 × 139,143,172.50
4. Step 4: Simplify right side
   64,466,973x = 19,360,822,453,364,756
5. Step 5: Solve for x
   x = 19,360,822,453,364,756/64,466,973
6. Step 6: Final answer
   x = 300,321,568.59