Finding the Third Proportional to 909,738,918 and 1,300,037,991

Step by Step Solution

1. Step 1: Write the proportion equation
   909,738,918 : 1,300,037,991 = 1,300,037,991 : x
2. Step 2: Convert to fraction form
   909,738,918/1,300,037,991 = 1,300,037,991/x
3. Step 3: Cross multiply
   909,738,918x = 1,300,037,991 × 1,300,037,991
4. Step 4: Simplify right side
   909,738,918x = 1,690,098,778,043,315,968
5. Step 5: Solve for x
   x = 1,690,098,778,043,315,968/909,738,918
6. Step 6: Final answer
   x = 1,857,784,408.91