Finding the Third Proportional to 72,421 and 153,590

Step by Step Solution

1. Step 1: Write the proportion equation
   72,421 : 153,590 = 153,590 : x
2. Step 2: Convert to fraction form
   72,421/153,590 = 153,590/x
3. Step 3: Cross multiply
   72,421x = 153,590 × 153,590
4. Step 4: Simplify right side
   72,421x = 23,589,888,100
5. Step 5: Solve for x
   x = 23,589,888,100/72,421
6. Step 6: Final answer
   x = 325,732.70