Finding the Third Proportional to 141,648 and 309,432

Step by Step Solution

1. Step 1: Write the proportion equation
   141,648 : 309,432 = 309,432 : x
2. Step 2: Convert to fraction form
   141,648/309,432 = 309,432/x
3. Step 3: Cross multiply
   141,648x = 309,432 × 309,432
4. Step 4: Simplify right side
   141,648x = 95,748,162,624
5. Step 5: Solve for x
   x = 95,748,162,624/141,648
6. Step 6: Final answer
   x = 675,958.45