Finding the Third Proportional to 312,904 and 672,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   312,904 : 672,980.50 = 672,980.50 : x
2. Step 2: Convert to fraction form
   312,904/672,980.50 = 672,980.50/x
3. Step 3: Cross multiply
   312,904x = 672,980.50 × 672,980.50
4. Step 4: Simplify right side
   312,904x = 452,902,753,380.25
5. Step 5: Solve for x
   x = 452,902,753,380.25/312,904
6. Step 6: Final answer
   x = 1,447,417.59