Finding the Third Proportional to 50,686,326 and 78,519,780

Step by Step Solution

1. Step 1: Write the proportion equation
   50,686,326 : 78,519,780 = 78,519,780 : x
2. Step 2: Convert to fraction form
   50,686,326/78,519,780 = 78,519,780/x
3. Step 3: Cross multiply
   50,686,326x = 78,519,780 × 78,519,780
4. Step 4: Simplify right side
   50,686,326x = 6,165,355,851,248,400
5. Step 5: Solve for x
   x = 6,165,355,851,248,400/50,686,326
6. Step 6: Final answer
   x = 121,637,458.02