Finding the Third Proportional to 289,782 and 631,049.63

Step by Step Solution

1. Step 1: Write the proportion equation
   289,782 : 631,049.63 = 631,049.63 : x
2. Step 2: Convert to fraction form
   289,782/631,049.63 = 631,049.63/x
3. Step 3: Cross multiply
   289,782x = 631,049.63 × 631,049.63
4. Step 4: Simplify right side
   289,782x = 398,223,629,212.64
5. Step 5: Solve for x
   x = 398,223,629,212.64/289,782
6. Step 6: Final answer
   x = 1,374,217.96