Finding the Third Proportional to 324,658.50 and 499,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   324,658.50 : 499,300.50 = 499,300.50 : x
2. Step 2: Convert to fraction form
   324,658.50/499,300.50 = 499,300.50/x
3. Step 3: Cross multiply
   324,658.50x = 499,300.50 × 499,300.50
4. Step 4: Simplify right side
   324,658.50x = 249,300,989,300.25
5. Step 5: Solve for x
   x = 249,300,989,300.25/324,658.50
6. Step 6: Final answer
   x = 767,886.84