Finding the Third Proportional to 72,000 and 168,208.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,000 : 168,208.50 = 168,208.50 : x
2. Step 2: Convert to fraction form
   72,000/168,208.50 = 168,208.50/x
3. Step 3: Cross multiply
   72,000x = 168,208.50 × 168,208.50
4. Step 4: Simplify right side
   72,000x = 28,294,099,472.25
5. Step 5: Solve for x
   x = 28,294,099,472.25/72,000
6. Step 6: Final answer
   x = 392,973.60