Finding the Third Proportional to 8,946,648,978 and 13,342,389,141

Step by Step Solution

1. Step 1: Write the proportion equation
   8,946,648,978 : 13,342,389,141 = 13,342,389,141 : x
2. Step 2: Convert to fraction form
   8,946,648,978/13,342,389,141 = 13,342,389,141/x
3. Step 3: Cross multiply
   8,946,648,978x = 13,342,389,141 × 13,342,389,141
4. Step 4: Simplify right side
   8,946,648,978x = 178,019,347,989,874,704,384
5. Step 5: Solve for x
   x = 178,019,347,989,874,704,384/8,946,648,978
6. Step 6: Final answer
   x = 19,897,880,024.98