Finding the Third Proportional to 321,931.50 and 498,253.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,931.50 : 498,253.50 = 498,253.50 : x
2. Step 2: Convert to fraction form
   321,931.50/498,253.50 = 498,253.50/x
3. Step 3: Cross multiply
   321,931.50x = 498,253.50 × 498,253.50
4. Step 4: Simplify right side
   321,931.50x = 248,256,550,262.25
5. Step 5: Solve for x
   x = 248,256,550,262.25/321,931.50
6. Step 6: Final answer
   x = 771,147.12