Finding the Third Proportional to 139,804,980 and 209,707,488

Step by Step Solution

1. Step 1: Write the proportion equation
   139,804,980 : 209,707,488 = 209,707,488 : x
2. Step 2: Convert to fraction form
   139,804,980/209,707,488 = 209,707,488/x
3. Step 3: Cross multiply
   139,804,980x = 209,707,488 × 209,707,488
4. Step 4: Simplify right side
   139,804,980x = 43,977,230,523,270,144
5. Step 5: Solve for x
   x = 43,977,230,523,270,144/139,804,980
6. Step 6: Final answer
   x = 314,561,259.00