Finding the Third Proportional to 619,285.50 and 872,066.25

Step by Step Solution

1. Step 1: Write the proportion equation
   619,285.50 : 872,066.25 = 872,066.25 : x
2. Step 2: Convert to fraction form
   619,285.50/872,066.25 = 872,066.25/x
3. Step 3: Cross multiply
   619,285.50x = 872,066.25 × 872,066.25
4. Step 4: Simplify right side
   619,285.50x = 760,499,544,389.06
5. Step 5: Solve for x
   x = 760,499,544,389.06/619,285.50
6. Step 6: Final answer
   x = 1,228,027.37