Finding the Third Proportional to 3,670,215 and 7,871,781

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670,215 : 7,871,781 = 7,871,781 : x
2. Step 2: Convert to fraction form
   3,670,215/7,871,781 = 7,871,781/x
3. Step 3: Cross multiply
   3,670,215x = 7,871,781 × 7,871,781
4. Step 4: Simplify right side
   3,670,215x = 61,964,936,111,961
5. Step 5: Solve for x
   x = 61,964,936,111,961/3,670,215
6. Step 6: Final answer
   x = 16,883,189.71