Finding the Third Proportional to 912,188,997.56 and 1,991,582,615.95

Step by Step Solution

1. Step 1: Write the proportion equation
   912,188,997.56 : 1,991,582,615.95 = 1,991,582,615.95 : x
2. Step 2: Convert to fraction form
   912,188,997.56/1,991,582,615.95 = 1,991,582,615.95/x
3. Step 3: Cross multiply
   912,188,997.56x = 1,991,582,615.95 × 1,991,582,615.95
4. Step 4: Simplify right side
   912,188,997.56x = 3,966,401,316,166,991,872
5. Step 5: Solve for x
   x = 3,966,401,316,166,991,872/912,188,997.56
6. Step 6: Final answer
   x = 4,348,223,149.77