Finding the Third Proportional to 3,831,120 and 5,578,200

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831,120 : 5,578,200 = 5,578,200 : x
2. Step 2: Convert to fraction form
   3,831,120/5,578,200 = 5,578,200/x
3. Step 3: Cross multiply
   3,831,120x = 5,578,200 × 5,578,200
4. Step 4: Simplify right side
   3,831,120x = 31,116,315,240,000
5. Step 5: Solve for x
   x = 31,116,315,240,000/3,831,120
6. Step 6: Final answer
   x = 8,121,989.19