Finding the Third Proportional to 312,154 and 671,650

Step by Step Solution

1. Step 1: Write the proportion equation
   312,154 : 671,650 = 671,650 : x
2. Step 2: Convert to fraction form
   312,154/671,650 = 671,650/x
3. Step 3: Cross multiply
   312,154x = 671,650 × 671,650
4. Step 4: Simplify right side
   312,154x = 451,113,722,500
5. Step 5: Solve for x
   x = 451,113,722,500/312,154
6. Step 6: Final answer
   x = 1,445,164.00