Finding the Third Proportional to 5,090,642 and 7,120,790

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090,642 : 7,120,790 = 7,120,790 : x
2. Step 2: Convert to fraction form
   5,090,642/7,120,790 = 7,120,790/x
3. Step 3: Cross multiply
   5,090,642x = 7,120,790 × 7,120,790
4. Step 4: Simplify right side
   5,090,642x = 50,705,650,224,100
5. Step 5: Solve for x
   x = 50,705,650,224,100/5,090,642
6. Step 6: Final answer
   x = 9,960,561.01