Finding the Third Proportional to 5,112,928 and 8,139,616

Step by Step Solution

1. Step 1: Write the proportion equation
   5,112,928 : 8,139,616 = 8,139,616 : x
2. Step 2: Convert to fraction form
   5,112,928/8,139,616 = 8,139,616/x
3. Step 3: Cross multiply
   5,112,928x = 8,139,616 × 8,139,616
4. Step 4: Simplify right side
   5,112,928x = 66,253,348,627,456
5. Step 5: Solve for x
   x = 66,253,348,627,456/5,112,928
6. Step 6: Final answer
   x = 12,958,005.40