Finding the Third Proportional to 317,659.50 and 492,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   317,659.50 : 492,061.50 = 492,061.50 : x
2. Step 2: Convert to fraction form
   317,659.50/492,061.50 = 492,061.50/x
3. Step 3: Cross multiply
   317,659.50x = 492,061.50 × 492,061.50
4. Step 4: Simplify right side
   317,659.50x = 242,124,519,782.25
5. Step 5: Solve for x
   x = 242,124,519,782.25/317,659.50
6. Step 6: Final answer
   x = 762,214.01