Finding the Third Proportional to 393,768 and 582,349.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,768 : 582,349.50 = 582,349.50 : x
2. Step 2: Convert to fraction form
   393,768/582,349.50 = 582,349.50/x
3. Step 3: Cross multiply
   393,768x = 582,349.50 × 582,349.50
4. Step 4: Simplify right side
   393,768x = 339,130,940,150.25
5. Step 5: Solve for x
   x = 339,130,940,150.25/393,768
6. Step 6: Final answer
   x = 861,245.56