Finding the Third Proportional to 507,800.50 and 788,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   507,800.50 : 788,816.50 = 788,816.50 : x
2. Step 2: Convert to fraction form
   507,800.50/788,816.50 = 788,816.50/x
3. Step 3: Cross multiply
   507,800.50x = 788,816.50 × 788,816.50
4. Step 4: Simplify right side
   507,800.50x = 622,231,470,672.25
5. Step 5: Solve for x
   x = 622,231,470,672.25/507,800.50
6. Step 6: Final answer
   x = 1,225,346.31