Finding the Third Proportional to 72,900 and 153,697.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,900 : 153,697.50 = 153,697.50 : x
2. Step 2: Convert to fraction form
   72,900/153,697.50 = 153,697.50/x
3. Step 3: Cross multiply
   72,900x = 153,697.50 × 153,697.50
4. Step 4: Simplify right side
   72,900x = 23,622,921,506.25
5. Step 5: Solve for x
   x = 23,622,921,506.25/72,900
6. Step 6: Final answer
   x = 324,045.56