Finding the Third Proportional to 295,412.06 and 644,291.72

Step by Step Solution

1. Step 1: Write the proportion equation
   295,412.06 : 644,291.72 = 644,291.72 : x
2. Step 2: Convert to fraction form
   295,412.06/644,291.72 = 644,291.72/x
3. Step 3: Cross multiply
   295,412.06x = 644,291.72 × 644,291.72
4. Step 4: Simplify right side
   295,412.06x = 415,111,818,849.83
5. Step 5: Solve for x
   x = 415,111,818,849.83/295,412.06
6. Step 6: Final answer
   x = 1,405,195.90