Finding the Third Proportional to 5,090,579 and 7,120,723

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090,579 : 7,120,723 = 7,120,723 : x
2. Step 2: Convert to fraction form
   5,090,579/7,120,723 = 7,120,723/x
3. Step 3: Cross multiply
   5,090,579x = 7,120,723 × 7,120,723
4. Step 4: Simplify right side
   5,090,579x = 50,704,696,042,729
5. Step 5: Solve for x
   x = 50,704,696,042,729/5,090,579
6. Step 6: Final answer
   x = 9,960,496.84