Finding the Third Proportional to 77,653,128 and 123,621,086

Step by Step Solution

1. Step 1: Write the proportion equation
   77,653,128 : 123,621,086 = 123,621,086 : x
2. Step 2: Convert to fraction form
   77,653,128/123,621,086 = 123,621,086/x
3. Step 3: Cross multiply
   77,653,128x = 123,621,086 × 123,621,086
4. Step 4: Simplify right side
   77,653,128x = 15,282,172,903,819,396
5. Step 5: Solve for x
   x = 15,282,172,903,819,396/77,653,128
6. Step 6: Final answer
   x = 196,800,480.51