Finding the Third Proportional to 155,436 and 197,172

Step by Step Solution

1. Step 1: Write the proportion equation
   155,436 : 197,172 = 197,172 : x
2. Step 2: Convert to fraction form
   155,436/197,172 = 197,172/x
3. Step 3: Cross multiply
   155,436x = 197,172 × 197,172
4. Step 4: Simplify right side
   155,436x = 38,876,797,584
5. Step 5: Solve for x
   x = 38,876,797,584/155,436
6. Step 6: Final answer
   x = 250,114.50