Finding the Third Proportional to 576,115.50 and 872,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   576,115.50 : 872,131.50 = 872,131.50 : x
2. Step 2: Convert to fraction form
   576,115.50/872,131.50 = 872,131.50/x
3. Step 3: Cross multiply
   576,115.50x = 872,131.50 × 872,131.50
4. Step 4: Simplify right side
   576,115.50x = 760,613,353,292.25
5. Step 5: Solve for x
   x = 760,613,353,292.25/576,115.50
6. Step 6: Final answer
   x = 1,320,244.56