Finding the Third Proportional to 143,671,707.28 and 315,155,493.56

Step by Step Solution

1. Step 1: Write the proportion equation
   143,671,707.28 : 315,155,493.56 = 315,155,493.56 : x
2. Step 2: Convert to fraction form
   143,671,707.28/315,155,493.56 = 315,155,493.56/x
3. Step 3: Cross multiply
   143,671,707.28x = 315,155,493.56 × 315,155,493.56
4. Step 4: Simplify right side
   143,671,707.28x = 99,322,985,122,622,976
5. Step 5: Solve for x
   x = 99,322,985,122,622,976/143,671,707.28
6. Step 6: Final answer
   x = 691,319,028.65