Finding the Third Proportional to 316,003.50 and 676,291.50

Step by Step Solution

1. Step 1: Write the proportion equation
   316,003.50 : 676,291.50 = 676,291.50 : x
2. Step 2: Convert to fraction form
   316,003.50/676,291.50 = 676,291.50/x
3. Step 3: Cross multiply
   316,003.50x = 676,291.50 × 676,291.50
4. Step 4: Simplify right side
   316,003.50x = 457,370,192,972.25
5. Step 5: Solve for x
   x = 457,370,192,972.25/316,003.50
6. Step 6: Final answer
   x = 1,447,358.00