Finding the Third Proportional to 30,888 and 72,900

Step by Step Solution

1. Step 1: Write the proportion equation
   30,888 : 72,900 = 72,900 : x
2. Step 2: Convert to fraction form
   30,888/72,900 = 72,900/x
3. Step 3: Cross multiply
   30,888x = 72,900 × 72,900
4. Step 4: Simplify right side
   30,888x = 5,314,410,000
5. Step 5: Solve for x
   x = 5,314,410,000/30,888
6. Step 6: Final answer
   x = 172,054.20