Finding the Third Proportional to 316,048.50 and 676,386

Step by Step Solution

1. Step 1: Write the proportion equation
   316,048.50 : 676,386 = 676,386 : x
2. Step 2: Convert to fraction form
   316,048.50/676,386 = 676,386/x
3. Step 3: Cross multiply
   316,048.50x = 676,386 × 676,386
4. Step 4: Simplify right side
   316,048.50x = 457,498,020,996
5. Step 5: Solve for x
   x = 457,498,020,996/316,048.50
6. Step 6: Final answer
   x = 1,447,556.38