Finding the Third Proportional to 308,809.50 and 650,824.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,809.50 : 650,824.50 = 650,824.50 : x
2. Step 2: Convert to fraction form
   308,809.50/650,824.50 = 650,824.50/x
3. Step 3: Cross multiply
   308,809.50x = 650,824.50 × 650,824.50
4. Step 4: Simplify right side
   308,809.50x = 423,572,529,800.25
5. Step 5: Solve for x
   x = 423,572,529,800.25/308,809.50
6. Step 6: Final answer
   x = 1,371,630.50