Finding the Third Proportional to 12,978,216 and 30,043,728

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,216 : 30,043,728 = 30,043,728 : x
2. Step 2: Convert to fraction form
   12,978,216/30,043,728 = 30,043,728/x
3. Step 3: Cross multiply
   12,978,216x = 30,043,728 × 30,043,728
4. Step 4: Simplify right side
   12,978,216x = 902,625,592,137,984
5. Step 5: Solve for x
   x = 902,625,592,137,984/12,978,216
6. Step 6: Final answer
   x = 69,549,281.05