Finding the Third Proportional to 212,955 and 329,692.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,955 : 329,692.50 = 329,692.50 : x
2. Step 2: Convert to fraction form
   212,955/329,692.50 = 329,692.50/x
3. Step 3: Cross multiply
   212,955x = 329,692.50 × 329,692.50
4. Step 4: Simplify right side
   212,955x = 108,697,144,556.25
5. Step 5: Solve for x
   x = 108,697,144,556.25/212,955
6. Step 6: Final answer
   x = 510,423.07