Finding the Third Proportional to 139,291,607.25 and 209,288,412

Step by Step Solution

1. Step 1: Write the proportion equation
   139,291,607.25 : 209,288,412 = 209,288,412 : x
2. Step 2: Convert to fraction form
   139,291,607.25/209,288,412 = 209,288,412/x
3. Step 3: Cross multiply
   139,291,607.25x = 209,288,412 × 209,288,412
4. Step 4: Simplify right side
   139,291,607.25x = 43,801,639,397,481,744
5. Step 5: Solve for x
   x = 43,801,639,397,481,744/139,291,607.25
6. Step 6: Final answer
   x = 314,460,004.18