Finding the Third Proportional to 139,804,930 and 209,707,415

Step by Step Solution

1. Step 1: Write the proportion equation
   139,804,930 : 209,707,415 = 209,707,415 : x
2. Step 2: Convert to fraction form
   139,804,930/209,707,415 = 209,707,415/x
3. Step 3: Cross multiply
   139,804,930x = 209,707,415 × 209,707,415
4. Step 4: Simplify right side
   139,804,930x = 43,977,199,905,982,224
5. Step 5: Solve for x
   x = 43,977,199,905,982,224/139,804,930
6. Step 6: Final answer
   x = 314,561,152.50