Finding the Third Proportional to 72,900 and 155,911.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,900 : 155,911.50 = 155,911.50 : x
2. Step 2: Convert to fraction form
   72,900/155,911.50 = 155,911.50/x
3. Step 3: Cross multiply
   72,900x = 155,911.50 × 155,911.50
4. Step 4: Simplify right side
   72,900x = 24,308,395,832.25
5. Step 5: Solve for x
   x = 24,308,395,832.25/72,900
6. Step 6: Final answer
   x = 333,448.50