Finding the Third Proportional to 3,490,428 and 5,120,730

Step by Step Solution

1. Step 1: Write the proportion equation
   3,490,428 : 5,120,730 = 5,120,730 : x
2. Step 2: Convert to fraction form
   3,490,428/5,120,730 = 5,120,730/x
3. Step 3: Cross multiply
   3,490,428x = 5,120,730 × 5,120,730
4. Step 4: Simplify right side
   3,490,428x = 26,221,875,732,900
5. Step 5: Solve for x
   x = 26,221,875,732,900/3,490,428
6. Step 6: Final answer
   x = 7,512,510.14