Finding the Third Proportional to 78,457 and 161,048.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457 : 161,048.50 = 161,048.50 : x
2. Step 2: Convert to fraction form
   78,457/161,048.50 = 161,048.50/x
3. Step 3: Cross multiply
   78,457x = 161,048.50 × 161,048.50
4. Step 4: Simplify right side
   78,457x = 25,936,619,352.25
5. Step 5: Solve for x
   x = 25,936,619,352.25/78,457
6. Step 6: Final answer
   x = 330,583.88