Finding the Third Proportional to 312,907.50 and 672,970

Step by Step Solution

1. Step 1: Write the proportion equation
   312,907.50 : 672,970 = 672,970 : x
2. Step 2: Convert to fraction form
   312,907.50/672,970 = 672,970/x
3. Step 3: Cross multiply
   312,907.50x = 672,970 × 672,970
4. Step 4: Simplify right side
   312,907.50x = 452,888,620,900
5. Step 5: Solve for x
   x = 452,888,620,900/312,907.50
6. Step 6: Final answer
   x = 1,447,356.23