Finding the Third Proportional to 162,219 and 216,991.50

Step by Step Solution

1. Step 1: Write the proportion equation
   162,219 : 216,991.50 = 216,991.50 : x
2. Step 2: Convert to fraction form
   162,219/216,991.50 = 216,991.50/x
3. Step 3: Cross multiply
   162,219x = 216,991.50 × 216,991.50
4. Step 4: Simplify right side
   162,219x = 47,085,311,072.25
5. Step 5: Solve for x
   x = 47,085,311,072.25/162,219
6. Step 6: Final answer
   x = 290,257.68