Finding the Third Proportional to 172,216.50 and 364,920

Step by Step Solution

1. Step 1: Write the proportion equation
   172,216.50 : 364,920 = 364,920 : x
2. Step 2: Convert to fraction form
   172,216.50/364,920 = 364,920/x
3. Step 3: Cross multiply
   172,216.50x = 364,920 × 364,920
4. Step 4: Simplify right side
   172,216.50x = 133,166,606,400
5. Step 5: Solve for x
   x = 133,166,606,400/172,216.50
6. Step 6: Final answer
   x = 773,251.15