Finding the Third Proportional to 161,085 and 247,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,085 : 247,216.50 = 247,216.50 : x
2. Step 2: Convert to fraction form
   161,085/247,216.50 = 247,216.50/x
3. Step 3: Cross multiply
   161,085x = 247,216.50 × 247,216.50
4. Step 4: Simplify right side
   161,085x = 61,115,997,872.25
5. Step 5: Solve for x
   x = 61,115,997,872.25/161,085
6. Step 6: Final answer
   x = 379,402.17