Finding the Third Proportional to 4,978,562 and 7,688,958

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,562 : 7,688,958 = 7,688,958 : x
2. Step 2: Convert to fraction form
   4,978,562/7,688,958 = 7,688,958/x
3. Step 3: Cross multiply
   4,978,562x = 7,688,958 × 7,688,958
4. Step 4: Simplify right side
   4,978,562x = 59,120,075,125,764
5. Step 5: Solve for x
   x = 59,120,075,125,764/4,978,562
6. Step 6: Final answer
   x = 11,874,929.97