Finding the Third Proportional to 86,405,456 and 188,950,810

Step by Step Solution

1. Step 1: Write the proportion equation
   86,405,456 : 188,950,810 = 188,950,810 : x
2. Step 2: Convert to fraction form
   86,405,456/188,950,810 = 188,950,810/x
3. Step 3: Cross multiply
   86,405,456x = 188,950,810 × 188,950,810
4. Step 4: Simplify right side
   86,405,456x = 35,702,408,599,656,100
5. Step 5: Solve for x
   x = 35,702,408,599,656,100/86,405,456
6. Step 6: Final answer
   x = 413,196,229.18