Finding the Third Proportional to 82,396,422 and 178,950,780

Step by Step Solution

1. Step 1: Write the proportion equation
   82,396,422 : 178,950,780 = 178,950,780 : x
2. Step 2: Convert to fraction form
   82,396,422/178,950,780 = 178,950,780/x
3. Step 3: Cross multiply
   82,396,422x = 178,950,780 × 178,950,780
4. Step 4: Simplify right side
   82,396,422x = 32,023,381,662,608,400
5. Step 5: Solve for x
   x = 32,023,381,662,608,400/82,396,422
6. Step 6: Final answer
   x = 388,650,148.70