Finding the Third Proportional to 72,288 and 156,644

Step by Step Solution

1. Step 1: Write the proportion equation
   72,288 : 156,644 = 156,644 : x
2. Step 2: Convert to fraction form
   72,288/156,644 = 156,644/x
3. Step 3: Cross multiply
   72,288x = 156,644 × 156,644
4. Step 4: Simplify right side
   72,288x = 24,537,342,736
5. Step 5: Solve for x
   x = 24,537,342,736/72,288
6. Step 6: Final answer
   x = 339,438.67