Finding the Third Proportional to 144,063,509 and 315,449,290

Step by Step Solution

1. Step 1: Write the proportion equation
   144,063,509 : 315,449,290 = 315,449,290 : x
2. Step 2: Convert to fraction form
   144,063,509/315,449,290 = 315,449,290/x
3. Step 3: Cross multiply
   144,063,509x = 315,449,290 × 315,449,290
4. Step 4: Simplify right side
   144,063,509x = 99,508,254,561,504,096
5. Step 5: Solve for x
   x = 99,508,254,561,504,096/144,063,509
6. Step 6: Final answer
   x = 690,724,911.90