Finding the Third Proportional to 72,456 and 152,790

Step by Step Solution

1. Step 1: Write the proportion equation
   72,456 : 152,790 = 152,790 : x
2. Step 2: Convert to fraction form
   72,456/152,790 = 152,790/x
3. Step 3: Cross multiply
   72,456x = 152,790 × 152,790
4. Step 4: Simplify right side
   72,456x = 23,344,784,100
5. Step 5: Solve for x
   x = 23,344,784,100/72,456
6. Step 6: Final answer
   x = 322,192.56