Finding the Third Proportional to 103,640 and 131,472

Step by Step Solution

1. Step 1: Write the proportion equation
   103,640 : 131,472 = 131,472 : x
2. Step 2: Convert to fraction form
   103,640/131,472 = 131,472/x
3. Step 3: Cross multiply
   103,640x = 131,472 × 131,472
4. Step 4: Simplify right side
   103,640x = 17,284,886,784
5. Step 5: Solve for x
   x = 17,284,886,784/103,640
6. Step 6: Final answer
   x = 166,778.14