Finding the Third Proportional to 161,121 and 248,971.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,121 : 248,971.50 = 248,971.50 : x
2. Step 2: Convert to fraction form
   161,121/248,971.50 = 248,971.50/x
3. Step 3: Cross multiply
   161,121x = 248,971.50 × 248,971.50
4. Step 4: Simplify right side
   161,121x = 61,986,807,812.25
5. Step 5: Solve for x
   x = 61,986,807,812.25/161,121
6. Step 6: Final answer
   x = 384,722.09