Finding the Third Proportional to 1,831,674 and 3,978,611

Step by Step Solution

1. Step 1: Write the proportion equation
   1,831,674 : 3,978,611 = 3,978,611 : x
2. Step 2: Convert to fraction form
   1,831,674/3,978,611 = 3,978,611/x
3. Step 3: Cross multiply
   1,831,674x = 3,978,611 × 3,978,611
4. Step 4: Simplify right side
   1,831,674x = 15,829,345,489,321
5. Step 5: Solve for x
   x = 15,829,345,489,321/1,831,674
6. Step 6: Final answer
   x = 8,642,010.25