Finding the Third Proportional to 318,894 and 494,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,894 : 494,485.50 = 494,485.50 : x
2. Step 2: Convert to fraction form
   318,894/494,485.50 = 494,485.50/x
3. Step 3: Cross multiply
   318,894x = 494,485.50 × 494,485.50
4. Step 4: Simplify right side
   318,894x = 244,515,909,710.25
5. Step 5: Solve for x
   x = 244,515,909,710.25/318,894
6. Step 6: Final answer
   x = 766,762.34