Finding the Third Proportional to 7,831,102,016.50 and 12,420,612,744.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,831,102,016.50 : 12,420,612,744.50 = 12,420,612,744.50 : x
2. Step 2: Convert to fraction form
   7,831,102,016.50/12,420,612,744.50 = 12,420,612,744.50/x
3. Step 3: Cross multiply
   7,831,102,016.50x = 12,420,612,744.50 × 12,420,612,744.50
4. Step 4: Simplify right side
   7,831,102,016.50x = 154,271,620,948,835,827,712
5. Step 5: Solve for x
   x = 154,271,620,948,835,827,712/7,831,102,016.50
6. Step 6: Final answer
   x = 19,699,860,967.69