Finding the Third Proportional to 139,804,920 and 209,707,400

Step by Step Solution

1. Step 1: Write the proportion equation
   139,804,920 : 209,707,400 = 209,707,400 : x
2. Step 2: Convert to fraction form
   139,804,920/209,707,400 = 209,707,400/x
3. Step 3: Cross multiply
   139,804,920x = 209,707,400 × 209,707,400
4. Step 4: Simplify right side
   139,804,920x = 43,977,193,614,760,000
5. Step 5: Solve for x
   x = 43,977,193,614,760,000/139,804,920
6. Step 6: Final answer
   x = 314,561,130.00