Finding the Third Proportional to 72,109.50 and 156,387

Step by Step Solution

1. Step 1: Write the proportion equation
   72,109.50 : 156,387 = 156,387 : x
2. Step 2: Convert to fraction form
   72,109.50/156,387 = 156,387/x
3. Step 3: Cross multiply
   72,109.50x = 156,387 × 156,387
4. Step 4: Simplify right side
   72,109.50x = 24,456,893,769
5. Step 5: Solve for x
   x = 24,456,893,769/72,109.50
6. Step 6: Final answer
   x = 339,163.27