Finding the Third Proportional to 173,137.50 and 378,270

Step by Step Solution

1. Step 1: Write the proportion equation
   173,137.50 : 378,270 = 378,270 : x
2. Step 2: Convert to fraction form
   173,137.50/378,270 = 378,270/x
3. Step 3: Cross multiply
   173,137.50x = 378,270 × 378,270
4. Step 4: Simplify right side
   173,137.50x = 143,088,192,900
5. Step 5: Solve for x
   x = 143,088,192,900/173,137.50
6. Step 6: Final answer
   x = 826,442.53