Finding the Third Proportional to 78,477.50 and 161,089

Step by Step Solution

1. Step 1: Write the proportion equation
   78,477.50 : 161,089 = 161,089 : x
2. Step 2: Convert to fraction form
   78,477.50/161,089 = 161,089/x
3. Step 3: Cross multiply
   78,477.50x = 161,089 × 161,089
4. Step 4: Simplify right side
   78,477.50x = 25,949,665,921
5. Step 5: Solve for x
   x = 25,949,665,921/78,477.50
6. Step 6: Final answer
   x = 330,663.77