Finding the Third Proportional to 576,142 and 872,173.50

Step by Step Solution

1. Step 1: Write the proportion equation
   576,142 : 872,173.50 = 872,173.50 : x
2. Step 2: Convert to fraction form
   576,142/872,173.50 = 872,173.50/x
3. Step 3: Cross multiply
   576,142x = 872,173.50 × 872,173.50
4. Step 4: Simplify right side
   576,142x = 760,686,614,102.25
5. Step 5: Solve for x
   x = 760,686,614,102.25/576,142
6. Step 6: Final answer
   x = 1,320,310.99