Finding the Third Proportional to 912,189,020 and 1,991,582,672

Step by Step Solution

1. Step 1: Write the proportion equation
   912,189,020 : 1,991,582,672 = 1,991,582,672 : x
2. Step 2: Convert to fraction form
   912,189,020/1,991,582,672 = 1,991,582,672/x
3. Step 3: Cross multiply
   912,189,020x = 1,991,582,672 × 1,991,582,672
4. Step 4: Simplify right side
   912,189,020x = 3,966,401,539,410,659,328
5. Step 5: Solve for x
   x = 3,966,401,539,410,659,328/912,189,020
6. Step 6: Final answer
   x = 4,348,223,287.55