Finding the Third Proportional to 1,831,576 and 3,978,440

Step by Step Solution

1. Step 1: Write the proportion equation
   1,831,576 : 3,978,440 = 3,978,440 : x
2. Step 2: Convert to fraction form
   1,831,576/3,978,440 = 3,978,440/x
3. Step 3: Cross multiply
   1,831,576x = 3,978,440 × 3,978,440
4. Step 4: Simplify right side
   1,831,576x = 15,827,984,833,600
5. Step 5: Solve for x
   x = 15,827,984,833,600/1,831,576
6. Step 6: Final answer
   x = 8,641,729.76