Finding the Third Proportional to 91,491,463 and 139,381,389

Step by Step Solution

1. Step 1: Write the proportion equation
   91,491,463 : 139,381,389 = 139,381,389 : x
2. Step 2: Convert to fraction form
   91,491,463/139,381,389 = 139,381,389/x
3. Step 3: Cross multiply
   91,491,463x = 139,381,389 × 139,381,389
4. Step 4: Simplify right side
   91,491,463x = 19,427,171,599,569,320
5. Step 5: Solve for x
   x = 19,427,171,599,569,320/91,491,463
6. Step 6: Final answer
   x = 212,338,626.61