Finding the Third Proportional to 78,485.50 and 166,772

Step by Step Solution

1. Step 1: Write the proportion equation
   78,485.50 : 166,772 = 166,772 : x
2. Step 2: Convert to fraction form
   78,485.50/166,772 = 166,772/x
3. Step 3: Cross multiply
   78,485.50x = 166,772 × 166,772
4. Step 4: Simplify right side
   78,485.50x = 27,812,899,984
5. Step 5: Solve for x
   x = 27,812,899,984/78,485.50
6. Step 6: Final answer
   x = 354,369.92