Finding the Third Proportional to 393,717 and 610,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,717 : 610,798.50 = 610,798.50 : x
2. Step 2: Convert to fraction form
   393,717/610,798.50 = 610,798.50/x
3. Step 3: Cross multiply
   393,717x = 610,798.50 × 610,798.50
4. Step 4: Simplify right side
   393,717x = 373,074,807,602.25
5. Step 5: Solve for x
   x = 373,074,807,602.25/393,717
6. Step 6: Final answer
   x = 947,570.99