Finding the Third Proportional to 5,090,918 and 10,978,458

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090,918 : 10,978,458 = 10,978,458 : x
2. Step 2: Convert to fraction form
   5,090,918/10,978,458 = 10,978,458/x
3. Step 3: Cross multiply
   5,090,918x = 10,978,458 × 10,978,458
4. Step 4: Simplify right side
   5,090,918x = 120,526,540,057,764
5. Step 5: Solve for x
   x = 120,526,540,057,764/5,090,918
6. Step 6: Final answer
   x = 23,674,814.65