Finding the Third Proportional to 393,708 and 610,788

Step by Step Solution

1. Step 1: Write the proportion equation
   393,708 : 610,788 = 610,788 : x
2. Step 2: Convert to fraction form
   393,708/610,788 = 610,788/x
3. Step 3: Cross multiply
   393,708x = 610,788 × 610,788
4. Step 4: Simplify right side
   393,708x = 373,061,980,944
5. Step 5: Solve for x
   x = 373,061,980,944/393,708
6. Step 6: Final answer
   x = 947,560.07