Finding the Third Proportional to 72,609 and 156,691.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,609 : 156,691.50 = 156,691.50 : x
2. Step 2: Convert to fraction form
   72,609/156,691.50 = 156,691.50/x
3. Step 3: Cross multiply
   72,609x = 156,691.50 × 156,691.50
4. Step 4: Simplify right side
   72,609x = 24,552,226,172.25
5. Step 5: Solve for x
   x = 24,552,226,172.25/72,609
6. Step 6: Final answer
   x = 338,143.01