Finding the Third Proportional to 158,245,912,991.72 and 213,510,891,902.15

Step by Step Solution

1. Step 1: Write the proportion equation
   158,245,912,991.72 : 213,510,891,902.15 = 213,510,891,902.15 : x
2. Step 2: Convert to fraction form
   158,245,912,991.72/213,510,891,902.15 = 213,510,891,902.15/x
3. Step 3: Cross multiply
   158,245,912,991.72x = 213,510,891,902.15 × 213,510,891,902.15
4. Step 4: Simplify right side
   158,245,912,991.72x = 45,586,900,960,851,580,157,952
5. Step 5: Solve for x
   x = 45,586,900,960,851,580,157,952/158,245,912,991.72
6. Step 6: Final answer
   x = 288,076,324,367.61