Finding the Third Proportional to 312,271 and 671,904.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,271 : 671,904.50 = 671,904.50 : x
2. Step 2: Convert to fraction form
   312,271/671,904.50 = 671,904.50/x
3. Step 3: Cross multiply
   312,271x = 671,904.50 × 671,904.50
4. Step 4: Simplify right side
   312,271x = 451,455,657,120.25
5. Step 5: Solve for x
   x = 451,455,657,120.25/312,271
6. Step 6: Final answer
   x = 1,445,717.52