Finding the Third Proportional to 443,162.81 and 687,506.91

Step by Step Solution

1. Step 1: Write the proportion equation
   443,162.81 : 687,506.91 = 687,506.91 : x
2. Step 2: Convert to fraction form
   443,162.81/687,506.91 = 687,506.91/x
3. Step 3: Cross multiply
   443,162.81x = 687,506.91 × 687,506.91
4. Step 4: Simplify right side
   443,162.81x = 472,665,746,141.45
5. Step 5: Solve for x
   x = 472,665,746,141.45/443,162.81
6. Step 6: Final answer
   x = 1,066,573.58