Finding the Third Proportional to 312,294 and 671,959.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,294 : 671,959.50 = 671,959.50 : x
2. Step 2: Convert to fraction form
   312,294/671,959.50 = 671,959.50/x
3. Step 3: Cross multiply
   312,294x = 671,959.50 × 671,959.50
4. Step 4: Simplify right side
   312,294x = 451,529,569,640.25
5. Step 5: Solve for x
   x = 451,529,569,640.25/312,294
6. Step 6: Final answer
   x = 1,445,847.73