Finding the Third Proportional to 72,716 and 111,731.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,716 : 111,731.50 = 111,731.50 : x
2. Step 2: Convert to fraction form
   72,716/111,731.50 = 111,731.50/x
3. Step 3: Cross multiply
   72,716x = 111,731.50 × 111,731.50
4. Step 4: Simplify right side
   72,716x = 12,483,928,092.25
5. Step 5: Solve for x
   x = 12,483,928,092.25/72,716
6. Step 6: Final answer
   x = 171,680.62