Finding the Third Proportional to 172,156 and 372,900

Step by Step Solution

1. Step 1: Write the proportion equation
   172,156 : 372,900 = 372,900 : x
2. Step 2: Convert to fraction form
   172,156/372,900 = 372,900/x
3. Step 3: Cross multiply
   172,156x = 372,900 × 372,900
4. Step 4: Simplify right side
   172,156x = 139,054,410,000
5. Step 5: Solve for x
   x = 139,054,410,000/172,156
6. Step 6: Final answer
   x = 807,723.29