Finding the Third Proportional to 141,624 and 309,012

Step by Step Solution

1. Step 1: Write the proportion equation
   141,624 : 309,012 = 309,012 : x
2. Step 2: Convert to fraction form
   141,624/309,012 = 309,012/x
3. Step 3: Cross multiply
   141,624x = 309,012 × 309,012
4. Step 4: Simplify right side
   141,624x = 95,488,416,144
5. Step 5: Solve for x
   x = 95,488,416,144/141,624
6. Step 6: Final answer
   x = 674,238.94