Finding the Third Proportional to 78,457.50 and 161,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457.50 : 161,086.50 = 161,086.50 : x
2. Step 2: Convert to fraction form
   78,457.50/161,086.50 = 161,086.50/x
3. Step 3: Cross multiply
   78,457.50x = 161,086.50 × 161,086.50
4. Step 4: Simplify right side
   78,457.50x = 25,948,860,482.25
5. Step 5: Solve for x
   x = 25,948,860,482.25/78,457.50
6. Step 6: Final answer
   x = 330,737.79