Finding the Third Proportional to 139,804,989 and 209,707,501

Step by Step Solution

1. Step 1: Write the proportion equation
   139,804,989 : 209,707,501 = 209,707,501 : x
2. Step 2: Convert to fraction form
   139,804,989/209,707,501 = 209,707,501/x
3. Step 3: Cross multiply
   139,804,989x = 209,707,501 × 209,707,501
4. Step 4: Simplify right side
   139,804,989x = 43,977,235,975,665,000
5. Step 5: Solve for x
   x = 43,977,235,975,665,000/139,804,989
6. Step 6: Final answer
   x = 314,561,277.75