Finding the Third Proportional to 1,016,991 and 1,379,640

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016,991 : 1,379,640 = 1,379,640 : x
2. Step 2: Convert to fraction form
   1,016,991/1,379,640 = 1,379,640/x
3. Step 3: Cross multiply
   1,016,991x = 1,379,640 × 1,379,640
4. Step 4: Simplify right side
   1,016,991x = 1,903,406,529,600
5. Step 5: Solve for x
   x = 1,903,406,529,600/1,016,991
6. Step 6: Final answer
   x = 1,871,606.07