Finding the Third Proportional to 5,090,586 and 7,120,725

Step by Step Solution

1. Step 1: Write the proportion equation
   5,090,586 : 7,120,725 = 7,120,725 : x
2. Step 2: Convert to fraction form
   5,090,586/7,120,725 = 7,120,725/x
3. Step 3: Cross multiply
   5,090,586x = 7,120,725 × 7,120,725
4. Step 4: Simplify right side
   5,090,586x = 50,704,724,525,625
5. Step 5: Solve for x
   x = 50,704,724,525,625/5,090,586
6. Step 6: Final answer
   x = 9,960,488.74