Finding the Third Proportional to 144,309 and 210,877.50

Step by Step Solution

1. Step 1: Write the proportion equation
   144,309 : 210,877.50 = 210,877.50 : x
2. Step 2: Convert to fraction form
   144,309/210,877.50 = 210,877.50/x
3. Step 3: Cross multiply
   144,309x = 210,877.50 × 210,877.50
4. Step 4: Simplify right side
   144,309x = 44,469,320,006.25
5. Step 5: Solve for x
   x = 44,469,320,006.25/144,309
6. Step 6: Final answer
   x = 308,153.48