Finding the Third Proportional to 555,624 and 829,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   555,624 : 829,777.50 = 829,777.50 : x
2. Step 2: Convert to fraction form
   555,624/829,777.50 = 829,777.50/x
3. Step 3: Cross multiply
   555,624x = 829,777.50 × 829,777.50
4. Step 4: Simplify right side
   555,624x = 688,530,699,506.25
5. Step 5: Solve for x
   x = 688,530,699,506.25/555,624
6. Step 6: Final answer
   x = 1,239,202.59