Finding the Third Proportional to 78,330 and 171,331.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,330 : 171,331.50 = 171,331.50 : x
2. Step 2: Convert to fraction form
   78,330/171,331.50 = 171,331.50/x
3. Step 3: Cross multiply
   78,330x = 171,331.50 × 171,331.50
4. Step 4: Simplify right side
   78,330x = 29,354,482,892.25
5. Step 5: Solve for x
   x = 29,354,482,892.25/78,330
6. Step 6: Final answer
   x = 374,754.03