Finding the Third Proportional to 4,978,559 and 7,688,955

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,559 : 7,688,955 = 7,688,955 : x
2. Step 2: Convert to fraction form
   4,978,559/7,688,955 = 7,688,955/x
3. Step 3: Cross multiply
   4,978,559x = 7,688,955 × 7,688,955
4. Step 4: Simplify right side
   4,978,559x = 59,120,028,992,025
5. Step 5: Solve for x
   x = 59,120,028,992,025/4,978,559
6. Step 6: Final answer
   x = 11,874,927.86