Finding the Third Proportional to 310,748 and 676,850.50

Step by Step Solution

1. Step 1: Write the proportion equation
   310,748 : 676,850.50 = 676,850.50 : x
2. Step 2: Convert to fraction form
   310,748/676,850.50 = 676,850.50/x
3. Step 3: Cross multiply
   310,748x = 676,850.50 × 676,850.50
4. Step 4: Simplify right side
   310,748x = 458,126,599,350.25
5. Step 5: Solve for x
   x = 458,126,599,350.25/310,748
6. Step 6: Final answer
   x = 1,474,270.47