Finding the Third Proportional to 171,564 and 248,490

Step by Step Solution

1. Step 1: Write the proportion equation
   171,564 : 248,490 = 248,490 : x
2. Step 2: Convert to fraction form
   171,564/248,490 = 248,490/x
3. Step 3: Cross multiply
   171,564x = 248,490 × 248,490
4. Step 4: Simplify right side
   171,564x = 61,747,280,100
5. Step 5: Solve for x
   x = 61,747,280,100/171,564
6. Step 6: Final answer
   x = 359,908.14