Finding the Third Proportional to 72,188 and 173,908

Step by Step Solution

1. Step 1: Write the proportion equation
   72,188 : 173,908 = 173,908 : x
2. Step 2: Convert to fraction form
   72,188/173,908 = 173,908/x
3. Step 3: Cross multiply
   72,188x = 173,908 × 173,908
4. Step 4: Simplify right side
   72,188x = 30,243,992,464
5. Step 5: Solve for x
   x = 30,243,992,464/72,188
6. Step 6: Final answer
   x = 418,961.50