Finding the Third Proportional to 143,872 and 309,552

Step by Step Solution

1. Step 1: Write the proportion equation
   143,872 : 309,552 = 309,552 : x
2. Step 2: Convert to fraction form
   143,872/309,552 = 309,552/x
3. Step 3: Cross multiply
   143,872x = 309,552 × 309,552
4. Step 4: Simplify right side
   143,872x = 95,822,440,704
5. Step 5: Solve for x
   x = 95,822,440,704/143,872
6. Step 6: Final answer
   x = 666,025.64