Finding the Third Proportional to 72,428.50 and 111,923.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,428.50 : 111,923.50 = 111,923.50 : x
2. Step 2: Convert to fraction form
   72,428.50/111,923.50 = 111,923.50/x
3. Step 3: Cross multiply
   72,428.50x = 111,923.50 × 111,923.50
4. Step 4: Simplify right side
   72,428.50x = 12,526,869,852.25
5. Step 5: Solve for x
   x = 12,526,869,852.25/72,428.50
6. Step 6: Final answer
   x = 172,954.98