Finding the Third Proportional to 306,731.25 and 669,231

Step by Step Solution

1. Step 1: Write the proportion equation
   306,731.25 : 669,231 = 669,231 : x
2. Step 2: Convert to fraction form
   306,731.25/669,231 = 669,231/x
3. Step 3: Cross multiply
   306,731.25x = 669,231 × 669,231
4. Step 4: Simplify right side
   306,731.25x = 447,870,131,361
5. Step 5: Solve for x
   x = 447,870,131,361/306,731.25
6. Step 6: Final answer
   x = 1,460,138.58