Finding the Third Proportional to 145,276 and 217,906.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,276 : 217,906.50 = 217,906.50 : x
2. Step 2: Convert to fraction form
   145,276/217,906.50 = 217,906.50/x
3. Step 3: Cross multiply
   145,276x = 217,906.50 × 217,906.50
4. Step 4: Simplify right side
   145,276x = 47,483,242,742.25
5. Step 5: Solve for x
   x = 47,483,242,742.25/145,276
6. Step 6: Final answer
   x = 326,848.50