Finding the Third Proportional to 212,713.50 and 329,328

Step by Step Solution

1. Step 1: Write the proportion equation
   212,713.50 : 329,328 = 329,328 : x
2. Step 2: Convert to fraction form
   212,713.50/329,328 = 329,328/x
3. Step 3: Cross multiply
   212,713.50x = 329,328 × 329,328
4. Step 4: Simplify right side
   212,713.50x = 108,456,931,584
5. Step 5: Solve for x
   x = 108,456,931,584/212,713.50
6. Step 6: Final answer
   x = 509,873.29