Finding the Third Proportional to 143,280 and 218,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,280 : 218,200.50 = 218,200.50 : x
2. Step 2: Convert to fraction form
   143,280/218,200.50 = 218,200.50/x
3. Step 3: Cross multiply
   143,280x = 218,200.50 × 218,200.50
4. Step 4: Simplify right side
   143,280x = 47,611,458,200.25
5. Step 5: Solve for x
   x = 47,611,458,200.25/143,280
6. Step 6: Final answer
   x = 332,296.61