Finding the Third Proportional to 393,727.50 and 607,980

Step by Step Solution

1. Step 1: Write the proportion equation
   393,727.50 : 607,980 = 607,980 : x
2. Step 2: Convert to fraction form
   393,727.50/607,980 = 607,980/x
3. Step 3: Cross multiply
   393,727.50x = 607,980 × 607,980
4. Step 4: Simplify right side
   393,727.50x = 369,639,680,400
5. Step 5: Solve for x
   x = 369,639,680,400/393,727.50
6. Step 6: Final answer
   x = 938,821.09