Finding the Third Proportional to 393,764 and 610,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,764 : 610,855.50 = 610,855.50 : x
2. Step 2: Convert to fraction form
   393,764/610,855.50 = 610,855.50/x
3. Step 3: Cross multiply
   393,764x = 610,855.50 × 610,855.50
4. Step 4: Simplify right side
   393,764x = 373,144,441,880.25
5. Step 5: Solve for x
   x = 373,144,441,880.25/393,764
6. Step 6: Final answer
   x = 947,634.73