Finding the Third Proportional to 137,328.50 and 212,215

Step by Step Solution

1. Step 1: Write the proportion equation
   137,328.50 : 212,215 = 212,215 : x
2. Step 2: Convert to fraction form
   137,328.50/212,215 = 212,215/x
3. Step 3: Cross multiply
   137,328.50x = 212,215 × 212,215
4. Step 4: Simplify right side
   137,328.50x = 45,035,206,225
5. Step 5: Solve for x
   x = 45,035,206,225/137,328.50
6. Step 6: Final answer
   x = 327,937.80