Finding the Third Proportional to 308,806.50 and 650,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,806.50 : 650,818.50 = 650,818.50 : x
2. Step 2: Convert to fraction form
   308,806.50/650,818.50 = 650,818.50/x
3. Step 3: Cross multiply
   308,806.50x = 650,818.50 × 650,818.50
4. Step 4: Simplify right side
   308,806.50x = 423,564,719,942.25
5. Step 5: Solve for x
   x = 423,564,719,942.25/308,806.50
6. Step 6: Final answer
   x = 1,371,618.54