Finding the Third Proportional to 186,574.50 and 399,744

Step by Step Solution

1. Step 1: Write the proportion equation
   186,574.50 : 399,744 = 399,744 : x
2. Step 2: Convert to fraction form
   186,574.50/399,744 = 399,744/x
3. Step 3: Cross multiply
   186,574.50x = 399,744 × 399,744
4. Step 4: Simplify right side
   186,574.50x = 159,795,265,536
5. Step 5: Solve for x
   x = 159,795,265,536/186,574.50
6. Step 6: Final answer
   x = 856,468.95