Finding the Third Proportional to 4,978,418 and 7,688,718

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,418 : 7,688,718 = 7,688,718 : x
2. Step 2: Convert to fraction form
   4,978,418/7,688,718 = 7,688,718/x
3. Step 3: Cross multiply
   4,978,418x = 7,688,718 × 7,688,718
4. Step 4: Simplify right side
   4,978,418x = 59,116,384,483,524
5. Step 5: Solve for x
   x = 59,116,384,483,524/4,978,418
6. Step 6: Final answer
   x = 11,874,532.13