Finding the Third Proportional to 318,411 and 494,059.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,411 : 494,059.50 = 494,059.50 : x
2. Step 2: Convert to fraction form
   318,411/494,059.50 = 494,059.50/x
3. Step 3: Cross multiply
   318,411x = 494,059.50 × 494,059.50
4. Step 4: Simplify right side
   318,411x = 244,094,789,540.25
5. Step 5: Solve for x
   x = 244,094,789,540.25/318,411
6. Step 6: Final answer
   x = 766,602.88