Finding the Third Proportional to 3,831,420 and 5,578,650

Step by Step Solution

1. Step 1: Write the proportion equation
   3,831,420 : 5,578,650 = 5,578,650 : x
2. Step 2: Convert to fraction form
   3,831,420/5,578,650 = 5,578,650/x
3. Step 3: Cross multiply
   3,831,420x = 5,578,650 × 5,578,650
4. Step 4: Simplify right side
   3,831,420x = 31,121,335,822,500
5. Step 5: Solve for x
   x = 31,121,335,822,500/3,831,420
6. Step 6: Final answer
   x = 8,122,663.61