Finding the Third Proportional to 155,968 and 217,309.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155,968 : 217,309.50 = 217,309.50 : x
2. Step 2: Convert to fraction form
   155,968/217,309.50 = 217,309.50/x
3. Step 3: Cross multiply
   155,968x = 217,309.50 × 217,309.50
4. Step 4: Simplify right side
   155,968x = 47,223,418,790.25
5. Step 5: Solve for x
   x = 47,223,418,790.25/155,968
6. Step 6: Final answer
   x = 302,776.33