Finding the Third Proportional to 33,989 and 72,900

Step by Step Solution

1. Step 1: Write the proportion equation
   33,989 : 72,900 = 72,900 : x
2. Step 2: Convert to fraction form
   33,989/72,900 = 72,900/x
3. Step 3: Cross multiply
   33,989x = 72,900 × 72,900
4. Step 4: Simplify right side
   33,989x = 5,314,410,000
5. Step 5: Solve for x
   x = 5,314,410,000/33,989
6. Step 6: Final answer
   x = 156,356.76