Finding the Third Proportional to 72,438 and 153,570

Step by Step Solution

1. Step 1: Write the proportion equation
   72,438 : 153,570 = 153,570 : x
2. Step 2: Convert to fraction form
   72,438/153,570 = 153,570/x
3. Step 3: Cross multiply
   72,438x = 153,570 × 153,570
4. Step 4: Simplify right side
   72,438x = 23,583,744,900
5. Step 5: Solve for x
   x = 23,583,744,900/72,438
6. Step 6: Final answer
   x = 325,571.45