Finding the Third Proportional to 120,435 and 250,428

Step by Step Solution

1. Step 1: Write the proportion equation
   120,435 : 250,428 = 250,428 : x
2. Step 2: Convert to fraction form
   120,435/250,428 = 250,428/x
3. Step 3: Cross multiply
   120,435x = 250,428 × 250,428
4. Step 4: Simplify right side
   120,435x = 62,714,183,184
5. Step 5: Solve for x
   x = 62,714,183,184/120,435
6. Step 6: Final answer
   x = 520,730.54