Finding the Third Proportional to 212,850 and 329,602.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,850 : 329,602.50 = 329,602.50 : x
2. Step 2: Convert to fraction form
   212,850/329,602.50 = 329,602.50/x
3. Step 3: Cross multiply
   212,850x = 329,602.50 × 329,602.50
4. Step 4: Simplify right side
   212,850x = 108,637,808,006.25
5. Step 5: Solve for x
   x = 108,637,808,006.25/212,850
6. Step 6: Final answer
   x = 510,396.09