Finding the Third Proportional to 312,084 and 673,876.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,084 : 673,876.50 = 673,876.50 : x
2. Step 2: Convert to fraction form
   312,084/673,876.50 = 673,876.50/x
3. Step 3: Cross multiply
   312,084x = 673,876.50 × 673,876.50
4. Step 4: Simplify right side
   312,084x = 454,109,537,252.25
5. Step 5: Solve for x
   x = 454,109,537,252.25/312,084
6. Step 6: Final answer
   x = 1,455,087.53