Finding the Third Proportional to 312,906 and 672,984.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,906 : 672,984.50 = 672,984.50 : x
2. Step 2: Convert to fraction form
   312,906/672,984.50 = 672,984.50/x
3. Step 3: Cross multiply
   312,906x = 672,984.50 × 672,984.50
4. Step 4: Simplify right side
   312,906x = 452,908,137,240.25
5. Step 5: Solve for x
   x = 452,908,137,240.25/312,906
6. Step 6: Final answer
   x = 1,447,425.54