Finding the Third Proportional to 105,421.50 and 168,612

Step by Step Solution

1. Step 1: Write the proportion equation
   105,421.50 : 168,612 = 168,612 : x
2. Step 2: Convert to fraction form
   105,421.50/168,612 = 168,612/x
3. Step 3: Cross multiply
   105,421.50x = 168,612 × 168,612
4. Step 4: Simplify right side
   105,421.50x = 28,430,006,544
5. Step 5: Solve for x
   x = 28,430,006,544/105,421.50
6. Step 6: Final answer
   x = 269,679.40