Finding the Third Proportional to 72,330 and 156,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,330 : 156,688.50 = 156,688.50 : x
2. Step 2: Convert to fraction form
   72,330/156,688.50 = 156,688.50/x
3. Step 3: Cross multiply
   72,330x = 156,688.50 × 156,688.50
4. Step 4: Simplify right side
   72,330x = 24,551,286,032.25
5. Step 5: Solve for x
   x = 24,551,286,032.25/72,330
6. Step 6: Final answer
   x = 339,434.34