Finding the Third Proportional to 139,308,677 and 300,430,991

Step by Step Solution

1. Step 1: Write the proportion equation
   139,308,677 : 300,430,991 = 300,430,991 : x
2. Step 2: Convert to fraction form
   139,308,677/300,430,991 = 300,430,991/x
3. Step 3: Cross multiply
   139,308,677x = 300,430,991 × 300,430,991
4. Step 4: Simplify right side
   139,308,677x = 90,258,780,353,242,080
5. Step 5: Solve for x
   x = 90,258,780,353,242,080/139,308,677
6. Step 6: Final answer
   x = 647,904,942.44