Finding the Third Proportional to 117,538 and 247,172

Step by Step Solution

1. Step 1: Write the proportion equation
   117,538 : 247,172 = 247,172 : x
2. Step 2: Convert to fraction form
   117,538/247,172 = 247,172/x
3. Step 3: Cross multiply
   117,538x = 247,172 × 247,172
4. Step 4: Simplify right side
   117,538x = 61,093,997,584
5. Step 5: Solve for x
   x = 61,093,997,584/117,538
6. Step 6: Final answer
   x = 519,780.82