Finding the Third Proportional to 90,108,992 and 139,590,672

Step by Step Solution

1. Step 1: Write the proportion equation
   90,108,992 : 139,590,672 = 139,590,672 : x
2. Step 2: Convert to fraction form
   90,108,992/139,590,672 = 139,590,672/x
3. Step 3: Cross multiply
   90,108,992x = 139,590,672 × 139,590,672
4. Step 4: Simplify right side
   90,108,992x = 19,485,555,709,411,584
5. Step 5: Solve for x
   x = 19,485,555,709,411,584/90,108,992
6. Step 6: Final answer
   x = 216,244,297.90