Finding the Third Proportional to 443,152 and 687,490

Step by Step Solution

1. Step 1: Write the proportion equation
   443,152 : 687,490 = 687,490 : x
2. Step 2: Convert to fraction form
   443,152/687,490 = 687,490/x
3. Step 3: Cross multiply
   443,152x = 687,490 × 687,490
4. Step 4: Simplify right side
   443,152x = 472,642,500,100
5. Step 5: Solve for x
   x = 472,642,500,100/443,152
6. Step 6: Final answer
   x = 1,066,547.14