Finding the Third Proportional to 72,144.50 and 156,610.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,144.50 : 156,610.50 = 156,610.50 : x
2. Step 2: Convert to fraction form
   72,144.50/156,610.50 = 156,610.50/x
3. Step 3: Cross multiply
   72,144.50x = 156,610.50 × 156,610.50
4. Step 4: Simplify right side
   72,144.50x = 24,526,848,710.25
5. Step 5: Solve for x
   x = 24,526,848,710.25/72,144.50
6. Step 6: Final answer
   x = 339,968.38